Answer:
He will need to pay Josue back 40 dollars I did this question before mark me brainliest
Step-by-step explanation:
If a data set has a standard deviation of 4 units and a mean of 10 units, the coefficient of variation is
According to the question The coefficient of variation for the given data set is 40%.
The coefficient of variation (CV) is a measure of relative variability and is calculated by dividing the standard deviation (SD) by the mean (μ) and expressing the result as a percentage.
The formula for the coefficient of variation is:
\(\[ CV = \left(\frac{SD}{\mu}\right) \times 100 \]\)
In this case, the standard deviation is 4 units and the mean is 10 units. Plugging these values into the formula, we get:
\(\[ CV = \left(\frac{4}{10}\right) \times 100 \]\)
\(\[ CV = 0.4 \times 100 \]\)
\(\[ CV = 40 \]\)
Therefore, the coefficient of variation for the given data set is 40%.
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Create a linear equation in slope-intercept form that contains the points (1, 4) and (4, 7). PLSS HELPP Giving brainliest
Answer:
Algebra - Linear Equations & Inequalities. T-37 /H-37 ... Tell which of the lines this point (2,5) lies on: 1. y = 2x + 1. 2. y = 1. 2 x + 4. 3. y = 3x + 1 ... y-intercept and slope to draw a graph.
graph the equation y = {x-5
5 ?
find the vertices and foci of the hyperbola. 4x2 − 16y2 = 64
The given equation of the hyperbola is 4x² - 16y² = 64. Let's find the vertices and foci of the hyperbola. First, let's write the equation in standard form by dividing both sides by 64 and simplifying the resulting equation.4x²/64 - 16y²/64 = 1x²/16 - y²/4 = 1
Comparing this equation with the standard form of a hyperbola, we see that the x-axis is the transverse axis and that the center of the hyperbola is (0, 0). Thus, the distance between the center and each vertex is a = 4 and the distance between the center and each focus is c, which we can find using the formula c² = a² + b², where b is the distance between the center and each asymptote. Since the asymptotes are y = ±(2/1)x, b = 2. Therefore, c² = 4² + 2² = 20, so c = sqrt(20) = 2sqrt(5). Thus, the vertices are (0 ± 4, 0) = (-4, 0) and (4, 0), and the foci are (0 ± 2sqrt(5), 0) = (-2sqrt(5), 0) and (2sqrt(5), 0).To summarize, the vertices are (-4, 0) and (4, 0), and the foci are (-2sqrt(5), 0) and (2sqrt(5), 0). The transverse axis is the x-axis and the conjugate axis is the y-axis.
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In march 2015, the public policy institute of california (ppic) surveyed 7525 likely voters living in california. Ppic researchers find that 68 out of 200 central valley residents approve of the california legislature and that 156 out of 300 bay area residents approve of the california legislature. Ppic is interested in the difference between the proportion of central valley and bay area residents who approve of the california legislature. Ppic researchers calculate that the standard error for the proportion of central valley residents who approve of the california legislature minus bay area residents who approve of the california legislature is about 0. 44. Find the 95% confidence interval to estimate the difference between the proportion of central valley and bay area residents who approve of the california legislature. Responses
The null hypothesis get rejected comparing the 95% confidence interval to the proportion of the given central valley residents and bay area residents .
As given in the question,
Total number of voters in California = 7525
x₁ = Number of voters of central valley residents approved California legislature
= 68
n₁ = Total number of voters of central valley residents
= 200
x₂ = Number of voters of bay area residents approved California legislature
= 156
n₂= Total number of voters of bay area residents
= 300
p₁ = proportion of voters of central valley
p₂= proportion of voters of bay area
p₁ = x₁/ n₁
= 68/200
= 0.34
p₂ = x₂/n₂
= 156/300
= 0.52
Standard error = √p₁(1 -p₁) / n₁ + p₂( 1- p₂)/n₂
= √0.34(1-0.34) / 200 + 0.52(1-0.52)/ 300
= √0.001122 + 0.000832
= 0.044
\(p_{w}\) = (68 + 156 )/ (200 + 300)
= 0.448
\(q_{w} = 1- p_{w}\)
= 1 - 0.448
= 0.552
null hypothesis p₁ - p₂ = 0
z = ( 0.52 - 0.34 ) - 0/ √(0.448)(0.552)( 1/200 + 1/300)
= 4
Tabular value for confidence interval 95% = 1.96
4 > 1.96
We reject the null hypothesis.
Therefore, the difference of proportion of central valley residents and the bay area residents rejection of null hypothesis as per given 95% confidence interval.
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Please help im begging
What is the solution to the system of equations?
1/3x-5=y
1/6x+y=4
Answers:
(18, 1)
(9/2, -7/2)
(-2, 17/3)
Answer:
A. (18, 1)
Step-by-step explanation:
If sin a is 3/5
Find tan a
Answer:
hope it helps
Step-by-step explanation:
What is the solution to the equation 6x+2-9-1?
X--3
X-1
X-1
X-3
Step-by-step explanation:
6x+2-9-1=0
6x+2-10=0
6x-8=0
6x=8
x=8/6
x=1.3
What is the measure of angle R?
Answer:
Step-by-step explanation:
∠R + ∠S + ∠T = 180 {Angle sum property of triangle}
∠R + 56 + 30 = 180
∠R + 86 = 180
∠R = 180 - 86
∠R = 94
Consider a grid of dots that is infinite in every direction. Pick one dot and label it x; find the dot three steps above and three steps right and label it y. How many paths of length 8 connect x to y?
There are 56 paths of length 8 connecting x to y on the grid.
To find the number of paths of length 8 connecting point x to point y on the grid, we can analyze the possible steps we can take from x to reach y. Since we need to move three steps above and three steps to the right, we can think of it as a sequence of 8 steps, where 3 steps are upward (U) and 3 steps are to the right (R).
To reach y from x in exactly 8 steps, we need to arrange these 8 steps in a way that includes exactly 3 U's and 3 R's. We can think of it as choosing the positions for the U's, and the remaining positions will be filled with R's. This can be done using combinations.
The number of ways to choose 3 positions out of 8 for the U's is given by the binomial coefficient C(8, 3). Similarly, the remaining positions will be filled with R's. Therefore, the total number of paths of length 8 connecting x to y is given by C(8, 3).
Using the formula for binomial coefficients, C(n, k) = n! / (k! * (n - k)!), we can calculate C(8, 3) as follows:
C(8, 3) = 8! / (3! * (8 - 3)!) = 8! / (3! * 5!) = (8 * 7 * 6) / (3 * 2 * 1) = 56.
Hence, there are 56 paths of length 8 connecting x to y on the grid.
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Asher is a asked to find the factors of 10 his work is below 10×1 = 10 10×2 = 2030 so the factors of 10 or 1020 and 30 which statements are true of ashes work in his answer check all that apply
Answer:
O Asher found multiples of 10, not factors of 10.
O Asher should have gotten this as the answer: 1,2,5, and 10
Step-by-step explanation:
Here is the full question :
Asher is asked to find the factors of 10. His work is below. 10 x 1 10 10 x 2 20 10 x 3 30 So, the factors of 10 are 10, 20, and 30 Which statements are true of Asher's work and his answer? Check all that apply
O Asher made errors in multiplication.
O Asher found multiples of 10, not factors of 10.
O Asher should have multiplied 10 x 4 as well.
O Asher should have gotten this as the answer: 1,2,5, and 10
O Asher should have gotten this as the answer: 10, 20, 30 40,
Factors are numbers that can divide a number exactly so that there would be no decimals.
The factors of 10 are 1,2,5,10
These numbers divide 10 exactly.
A multiple of a number are numbers derived by multiplying a number by an integer
Multiples of 10 include = 10, 20 , 30, 40, 50, 60, 70, 80, 90, 100
If three numbers 36,54 and another number have a G.C.D of 6 and L.C.M of 216, find the other number
Answer:
24
Step-by-step explanation:
The GCD of a set of numbers is the product of the prime factors, each to the lowest of the powers it has as a factor of any of the numbers.
The LCM of a set of numbers is the product of the prime factors, each to the highest of the powers it has as a factor of any of the numbers.
__
The factorizations of the given numbers are ...
36 = 2^2 × 3^2
54 = 2 × 3^3
__
6 = 2 × 3 . . . . . . . . . . . GCD
216 = 2^3 × 3^3 . . . . . LCM
This tells us the lowest powers of 2 and 3 are 2^1 and 3^1, and the highest powers of 2 and 3 are 2^3 and 3^3. Already, the lowest power of 2 matches the GCD, and the highest power of 3 matches the LCM. What we need is a number with a power of 2 that is 3, and a power of 3 that is 1:
2^3 × 3^1 = 24
The other number is 24.
PLSSS ANSWER QUICK
Find the expected value and standard deviation.
Answer:
1) E(X) = 1.5
2)SD = 1.118
Step-by-step explanation:
1) Formula for expected value of this set of data is;
E(X) = Σx * P(x)
Σx = 0 + 1 + 2 + 3 = 6
And P(x) = ¼
Thus;
E(X) = 6 × ¼ = 1.5
2) Formula for the standard deviation is;
SD = √Σ((x - μ)²•P(x))
Where μ is the expected value = 1.5
At x = 0,we have;
(0 - 1.5)² × 1/4 = 0.5625
At x = 1, we have;
(1 - 1.5)² × 1/4 = 0.0625
At x = 2, we have;
(2 - 1.5)² × 1/4 = 0.0625
At x = 3, we have;
(3 - 1.5)² × 1/4 = 0.5625
Thus,Σ((x - μ)²•P(x)) = 0.5625 + 0.0625 + 0.0625 + 0.5625 = 1.25
Thus;
SD = √1.25
SD = 1.118
nadu has finished 2/5 of his job in May, then finished 60% of the remaining job in June. How many percent of the job has he finished in total?
Answer: the two men work 5 hours per day, ... 75 people work 8 hours daily to complete a job in 27 days. ... How many hours per day should she work to finish the same piece of work in 7
Step-by-step explanation:
Answer:
96%
Step-by-step explanation:
Find all solutions to 3x2 + 2x + 1 = 0
Answer:
x = -3.5
Step-by-step explanation:
3 x 2 + 2x + 1 = 0
6 + 2x + 1 = 0
2x + 7 = 0
2x = -7
x = -7/2 = -3.5
Hope this helped! If not, please let me know! <3
there are 50 fish in a pond. 15 of the fish are trench of the fish that are not tench 1/5 are minnows and the rest are goldfish. What is the ratio of tench to minnows to goldfish in the pond?
The ratio of tench to minnows to goldfish in the pond is \(15:7:28\)
What is ratio ?Ratio indicates how many times one number contains another.
We have,
Total fish \(=50\)
Tench fish \(=15\)
Not tecnch \(= 50-15=35\)
According to the questions;
Of the fish that are not tench, \(\frac{1}{5}\) are minnows,
i.e. Minnows \(=\frac{1}{5}*35=7\)
Rest are goldfish i.e.
Goldfish \(= 50-(15+7)=28\)
So, the ratio of tench to minnows to goldfish is;
\(15:7:28\)
Hence, we can say that the ratio of tench to minnows to goldfish in the pond is \(15:7:28\) .
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Match the verbal expression (term) with its algebraic expression (definition).
Match Term Definition
d
Some number increased by two A) a ÷ 2
c
A variable decreased by two B) y2
e
Product of an unknown value and two C) x − 2
2
Quotient of some number and two D) b + 2
b
An unknown value squared E) 2z
The matching of definitions and terms are done below.
Some number increased by two ⇒ b + 2A variable decreased by two ⇒ x – 2Product of an unknown value and two ⇒ 2zQuotient of some number and two ⇒ a ÷ 2An unknown value squared ⇒ y²What is Algebra?The analysis of mathematical representations is algebra, and the handling of those symbols is logic.
Match the verbal expression (term) with its algebraic expression (definition).
Some number increased by two ⇒ b + 2
A variable decreased by two ⇒ x – 2
Product of an unknown value and two ⇒ 2z
Quotient of some number and two ⇒ a ÷ 2
An unknown value squared ⇒ y²
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a. DVDs can be made in a factory in New Mexico at the rate of 20 DVDs per $3, but the factory costs $80,000 to build. If they make 1 million DVDs, what is the unit cost per DVD? Pls I need help this is due at 12:00 pm!!!!
Answer:
$1
Step-by-step explanation:
To find the unit cost per DVD, you need to calculate the total cost of producing 1 million DVDs and divide that by the number of DVDs produced.
First, you need to find the cost of producing 1 DVD. You can do this by dividing the cost of building the factory by the number of DVDs produced per dollar spent on the factory:
cost of 1 DVD = $80,000 / (20 DVDs/$3) = $1
Then, you can multiply this cost by the number of DVDs produced to find the total cost of producing 1 million DVDs:
total cost = (cost of 1 DVD) * (number of DVDs) = $1/DVD * 1,000,000 DVDs = $1,000,000
Finally, you can divide the total cost by the number of DVDs produced to find the unit cost per DVD:
unit cost per DVD = total cost / number of DVDs = $1,000,000 / 1,000,000 DVDs = $1/DVD.
So, the unit cost of producing 1 DVD is $1.
Answer:
Step-by-step explanation:
I think you should divide
Suppose corn chips cost 33.5 cents per ounce. if a bag costs $4.35, how many ounces are in the bag of chips? Round your answer to the nearest hundredth, if necessary.
Answer:
13
Step-by-step explanation:
The radius r of a sphere is increasing at the uniform rate of 0.3 inches per second. At the instant when the surface area S becomes 100pi square inches, what is the rate of increase, in cubic inches per second, in the volume V?
The rate of increase in the volume V is 30π cubic inches per second when the surface area S becomes 100π square inches.
What is volume?
Volume refers to the amount of three-dimensional space occupied by an object or a substance.
To find the rate of increase in the volume V of a sphere when the surface area S becomes 100π square inches, we need to use the formulas relating the surface area and volume of a sphere to its radius.
The surface area S of a sphere is given by the formula:
\(S = 4\pi r^2,\)
where r is the radius of the sphere.
The volume V of a sphere is given by the formula:
\(V = (4/3)\pi r^3.\)
To find the rate of increase in volume with respect to time, we need to differentiate the volume formula with respect to time.
Given that the radius r is increasing at a uniform rate of 0.3 inches per second, we can write:
dr/dt = 0.3 inches per second.
Now, let's differentiate the volume formula with respect to time:
\(dV/dt = d/dt [(4/3)\pi r^3].\)
Using the power rule of differentiation, we get:
\(dV/dt = (4/3)\pi * 3r^2 * (dr/dt).\)
Simplifying further, we have:
\(dV/dt = 4\pi r^2 * (dr/dt).\)
Since we want to find the rate of increase in cubic inches per second, we need to express the volume in cubic inches.
Substituting the value of the surface area S = 100π square inches into the surface area formula:
\(100\pi = 4\pi r^2.\)
Dividing both sides by 4π, we get:
\(r^2 = 25.\)
Taking the square root of both sides, we find:
r = 5.
Now, we can substitute the value of r into the rate of increase formula:
\(dV/dt = 4\pi(5^2) * (0.3).\)
Simplifying the expression:
dV/dt = 4π(25) * 0.3.
dV/dt = 30π cubic inches per second.
Therefore, the rate of increase in the volume V is 30π cubic inches per second when the surface area S becomes 100π square inches.
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Solve for substitution 2x-3y=-12 x+y=9
Given data:
The first equation is 2x+3y=-12.
The second equation is x+y=9.
The second equation can be written as,
y=9-x
Substitute the above value in second equation.
2x+3(9-x)=-12
2x+27-3x=-12
-x=-39
x=39
The value of y is,
39+y=9
y=-30.
Thus, the value of x is 39, and the value of y is -30.
A theater has 1,464 seats. The seats are arranged into 62 equal-sized "regular" sections plus one "premium" front-row section. How many seats are in a regular section? How many seats are in the premium front-row section? Explain.
In the theater, that have 1,464 seats.
1426 seats are in "regular" sections
38 seats are "premium" front-row section
How to find the number of seats in the "regular" sectionsThe seat arrangement is solved by division. In this case the 62 equal spaced is the divisor while the number of seats is the in each row is the quotient
The division is as follows
1464 / 62
= 23 19/31
The number of seats in the regular section is 23 * 62 = 1426
The remainder will be arranged in premium front row
using equivalent fractions
19 / 31 = 38 / 62
the remainder is 38 and this is the seat for the premium front row section
OR 1464 - 1426 = 38 seats
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The angle of depression from the top of Pike’s Peak, at an altitude of 14,000 feet, to the city of Colorado Springs is 8o. The horizontal distance from the city to the peak is 58,000 feet. Find the altitude of Colorado Springs.
Answer:
\(\mbox{\large \boxed{\textsf{5, 849 \;feet}}}\)
Step-by-step explanation:
See figure for information pertaining to this explanation
The figure is self explanatory
The triangle ABC forms a right triangle with the vertical leg of length 14000-h and horizontal length of 58000
The angle opposite side 14000 - h = 8°
By the tangent formula
\(\tan 8^\circ = \dfrac{AB}{AC} = \dfrac{14000-h}{58000}\)
Switching sides,
\(\dfrac{14000-h}{58000} = \tan 8^\circ\)
\(14,000 - h = 58,000 \times \tan 8^\circ\\\\14,000 - h = 8,151.36 \approx 8,151\)
h = 14,000 - 8,151 = 5,849 feet
So the altitude of Colorado Springs is roughly 5,849 feet
This is close to the published value of 6,035 feet. The differences are due to estimate errors in horizontal distance, peak height and angle of depression
7.2x10^-3 I need help on this.
Answer:
0.0072
Step-by-step explanation:
The answer is 0.0072. I really hope this helps!
If it does help can you be kind and mark me the brainliest please? Peace and Love
Question 10 of 10
Which of the following is the surface area of the right cylinder below?
ge
OA. 192g units2
OB. 72 units2
OC. 176 units2
OD. 144g units
SUBMIT
The surface area of the right cylinder in terms of pi is 76π units².
What is the surface area of the right cylinder?A cylinder is simply a 3-dimensional shape having two parallel circular bases joined by a curved surface.
The surface area of a cylinder is expressed as;
Surface area = ( 2πr² ) + ( 2πrh )
Where r is the radius of the circular base, h is height and π is constant pi.
From the diagram:
Radius r = 8 units
Height h = 3 units
Surface area =?
Plug the given values into the above formula and solve for the surface area:
Surface area = ( 2πr² ) + ( 2πrh )
Surface area = ( 2π × 8² ) + ( 2π × 3 × 8 )
Surface area = ( 2π × 64 ) + ( 2π × 24 )
Surface area = 128π + 48π
Surface area = 176π units²
Therefore, the surface area is 176π units².
Option C) 176π units² is the correct answer.
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find parametric equations for the tangent line at t = 2 for x = (t − 1)2, y = 3, z = 2t3 − 3t2. (enter your answers as a comma-separated list of equations.)
The parametric equations for the tangent line at t=2 are:
x(t) = 1 + 2t
y(t) = 3
z(t) = 16 + 12t
To find the parametric equations for the tangent line at t=2, we first need to find the derivative of each coordinate function with respect to t, and then evaluate them at t=2.
1. Differentiate x(t) = (t-1)^2 with respect to t:
dx/dt = 2(t-1)
2. Differentiate y(t) = 3 with respect to t:
dy/dt = 0 (constant function)
3. Differentiate z(t) = 2t^3 - 3t^2 with respect to t:
dz/dt = 6t^2 - 6t
Now, evaluate the derivatives at t=2:
dx/dt(2) = 2(2-1) = 2
dy/dt(2) = 0
dz/dt(2) = 6(2^2) - 6(2) = 12
Next, find the point (x, y, z) at t=2:
x(2) = (2-1)^2 = 1
y(2) = 3
z(2) = 2(2)^3 - 3(2)^2 = 16
The parametric equations for the tangent line at t=2 are:
x(t) = 1 + 2t
y(t) = 3
z(t) = 16 + 12t
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A sample of 12 measurements has a mean of 31 and a standard deviation of 2 . Suppose that the sample is enlarged to 14 measurements, by including two additional measurements having a common value of 31 each. A. Find the mean of the sample of 14 measurements. Mean = B. Find the standard deviation of the sample of 14 measurements. Standard Deviation =
a. The mean of the sample is 31
b. The standard deviation remains the same = 2
How to determine the valuesThe formula for calculating mean of sample is expressed as;
Mean = (Sum of all measurements) / (Number of measurements)
Sum of measurements would be 12(31) = 372.
The addition of two measurements with a common value of 31.
Then, we have;
= 372 + 31 + 31 = 434.
Mean = 434 / 14
Mean = 31.00
B. The formula for calculating standard deviation is;
Standard Deviation = √((Sum of (each measurement - mean)²) / (Number of measurements))
Substitute the values, we have;
The sum of squared deviations= (31 - 31)² + (31 - 31)² = 0.
Then, we can say that there is no change in the standard deviation of the sample
Standard Deviation = 2.
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The standard deviation of the sample of 14 measurements is 1.48 (approx).
A sample of 12 measurements has a mean of 31 and a standard deviation of 2. Suppose that the sample is enlarged to 14 measurements, by including two additional measurements having a common value of 31 each.
The mean of the sample of 14 measurements:
In order to find the new mean of 14 measurements we first need to find out the total sum of the 14 measurements.
Total sum of 12 measurements = 12 x 31
= 372
The additional 2 measurements that have a common value of 31, contribute to the total sum 2 x 31 = 62
Total sum of 14 measurements = 372 + 62
= 434
Therefore, the new mean of the sample of 14 measurements will be the total sum of all measurements divided by the total number of measurements = 434 / 14
= 31.
The mean of the sample of 14 measurements is 31..
The standard deviation of the sample of 14 measurements:
Standard deviation of the sample of 14 measurements is given by:
σ = sqrt[ Σ ( Xi - µ )² / N ]
Where Xi is the individual data points, µ is the mean, and N is the total number of data points.
Let's calculate this by adding the additional two measurements to the original 12 measurements.
σ = sqrt[ ((12-1) x 2² + (31-31)² + (31-31)²) / 14 ]
σ = sqrt[ (44) / 14 ]
σ = sqrt[ 22/7 ]
= 1.48
Therefore, the standard deviation of the sample of 14 measurements is 1.48 (approx).
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Given f of x is equal to the quantity 8x plus 1 end quantity divided by the quantity 2x minus 9 end quantity, what is the end behavior of the function? As x → -∞, f(x) → 9 ; as x → ∞, f(x) → 9. As x → -∞, f(x) → -9; as x → ∞, f(x) → -9. As x → -∞, f(x) → -4; as x → ∞, f(x) → -4. As x → -∞, f(x) → 4; as x → ∞, f(x) → 4.
Using limits, it is found that the end behavior of the function is given as follows:
As x → -∞, f(x) → 4; as x → ∞, f(x) → 4.
How to find the end behavior of a function f(x)?The end behavior of a function f(x) is given by the limit of f(x) as x goes to infinity.
In this problem, the function is:
\(f(x) = \frac{8x - 1}{2x - 9}\)
Considering that x goes to infinity, for the limits, we consider only the terms with the highest exponents in the numerator and denominator, hence:
\(\lim_{x \rightarrow -\infty} f(x) = \lim_{x \rightarrow -\infty} \frac{8x}{2x} = \lim_{x \rightarrow -\infty} 4 = 4\).\(\lim_{x \rightarrow \infty} f(x) = \lim_{x \rightarrow \infty} \frac{8x}{2x} = \lim_{x \rightarrow \infty} 4 = 4\).Hence the correct statement is:
As x → -∞, f(x) → 4; as x → ∞, f(x) → 4.
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Answer:
D
Step-by-step explanation:
Claire ate dinner at her favorite restaurant. When she received her bill, she wanted to leave a 15% tip. What is the correct amount for Claire to tip, in dollars, if the bill was $9.00?
Answer:
$1.35
Step-by-step explanation:
We multiply $9.00 by 15% which equals to 1.35