Answer:
μ ≈ 2.33
σ ≈ 1.25
Step-by-step explanation:
Each person has equal probability of ⅓.
\(\left[\begin{array}{cc}X&P(X)\\1&\frac{1}{3}\\2&\frac{1}{3}\\4&\frac{1}{3}\end{array}\right]\)
The mean is the expected value:
μ = E(X) = ∑ X P(X)
μ = (1) (⅓) + (2) (⅓) + (4) (⅓)
μ = ⁷/₃
The standard deviation is:
σ² = ∑ (X−μ)² P(X)
σ² = (1 − ⁷/₃)² (⅓) + (2 − ⁷/₃)² (⅓) + (4 − ⁷/₃)² (⅓)
σ² = ¹⁴/₉
σ ≈ 1.25
Two vacationing families leave New York at the same time. They take 20 and 6 days, respectively, to reach their destination and return to New York. The vacationing families each take continuous trips to and from New York. How many days will pass before the two vacationing families leave New York on the same day again?
Answer:
Step-by-step explanation: evagline has 3/5 of box of nuts.she uses it to fill 6 bowls
Which expression is equivalent to 1.5 raised to the fifth power divided by 0.7 raised to the fourth power, all raised to the third power?
1.5 raised to the fifteenth power divided by 0.7 raised to the twelfth power
1.5 raised to the eighth power divided by 0.7 raised to the seventh power
2.13
2.115
The expression is equivalent to 1.5 raised to the fifth power divided by 0.7 raised to the fourth power, all raised to the third power is; Option A; 1.5 raised to the fifteenth power divided by 0.7 raised to the twelfth power
How to solve exponents?We want to find the expression that is equivalent to 1.5 raised to the fifth power divided by 0.7 raised to the fourth power, all raised to the third power.
The sentence above can be expressed as;
((1.5⁵)/(0.7⁴))³
This can be broken down into;
[1.5^(5 * 3)]/(0.7^(4 * 3))
1.5¹⁵/0.7¹²
Looking at the options, the only correct one is;
Option A; 1.5 raised to the fifteenth power divided by 0.7 raised to the twelfth power
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Answer: 1.5 raised to the fifteenth power divided by 0.7 raised to the twelfth power
Step-by-step explanation: I did the test.
Find the missing number in the following fraction calculation
/7 ÷10 =3/35
x=6
Step-by-step explanation:
x ÷ 7 ÷10 = 3/35
(Use trial & error - since I knew x<7)
6/7 ÷ 10 = 3/35
Or
3/35 x 10
(then, simplify it to 6/7 or ÷ that by 1/7 to get 6)
Hope this helps!
you have 51 coins in your pocket, all dimes and quarters. You have $10.20. How many dimes and quarters do you have?
To find the number of dimes and quarters, you have 17 dimes and 34 quarters in your pocket , when there are 51 coins in your pocket.
To solve this problem, we can set up a system of equations using the given information. Let's use "d" to represent the number of dimes and "q" to represent the number of quarters.
We know that there are 51 coins in total, so we can write the equation: d + q = 51.
We also know that the total value of the coins is $10.20, which can be expressed as 10d + 25q (since dimes are worth 10 cents and quarters are worth 25 cents). So our second equation is: 10d + 25q = 1020.
To solve this system of equations, we can use substitution or elimination. Let's use substitution:
Rearrange the first equation to solve for d: d = 51 - q.
Substitute this expression for d in the second equation: 10(51 - q) + 25q = 1020.
Simplify and solve for q: 510 - 10q + 25q = 1020.
Combine like terms: 15q = 510.
Divide both sides by 15: q = 34.
Now substitute this value back into the first equation to solve for d: d + 34 = 51.
Subtract 34 from both sides: d = 17.
Therefore, you have 17 dimes and 34 quarters.
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Consider the function g(x)
A bus company took a tour bus on the ferry when there were 30 people aboard. The ferry charged the bus company $180. The following week, the bus had 50 people on board and the ferry charged them $220. How much is the "base rate" for the empty bus? hint: look at the difference between number of people and cost to get cost per person and then cost without people
How much does each person cost?
Write an equation to show cost, c, of a bus with x number of people on it
Answer:
Base rate: $120
Rate: $2 per person
Equation: f(x)=2x+120
Step-by-step explanation:
If 30 people cost $180 and 50 people cost $220, the charge for 20 extra people is $40. This means, \(\frac{220-180dollars}{50-30people}=\frac{40dollars}{20people}=2\frac{dollars}{person}\).
These values correspond to a base rate for the bus of $120.
The function for the cost per bus with x number of people on it would be:
\(f(x)=2x+100\)
This can be checked by using the values given in the problem:
\(f(30)=2(30)+120=180\\f(50)=2(50)+120=220\)
The base rate of $120 and $2 per person satisfies the given equation and established values.
IN MAJOR NEED OF HELP
use the formula to find the leg of the triangle below. Make sure you show you show ur work. round to the nearest tenth if needed
The value of the missing leg from the triangle that has been shown is 8 mi .
Pythagoras theoremThe Pythagorean theorem provides a way to find the length of one side of a right-angled triangle if the lengths of the other two sides are known. It is widely used in various fields, such as engineering, architecture, physics, and trigonometry, to solve problems involving right triangles and calculate distances, angles, or other related quantities.
We know that;
\(c^2 = a^2 + b^2\\b^2 = 10^2 - 6^2\)
b = 8 mi
The Pythagorean theorem is named after the ancient Greek mathematician Pythagoras
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Bill is making a movie and needs to cast some actors. There are 5 actors ( Anne, Lisa, Diana, Maggie, and Susan ) interested in playing the female lead role, and 2 actors ( Jacob and Mark ) interested in playing the male lead role. Anne and Mark are Bill's siblings. What is the probability Bill will cast a family member in the movie?
Answer:
2 out of seven or 2/7 or 28.5%
Step-by-step explanation:
there are two "yeses" out of 7 total choices
Select all numbers that have and absolute value of 0.6
(6m-7)x4. Please help meeee
Answer:
=6mx^4−7x^4
Step-by-step explanation:
(6m−7)(x^4)
=(6m+−7)(x^4)
=(6m)(x^4)+(−7)(x^4)
\(\huge\text{Hey there!}\)
\(\mathsf{(6m - 7)\times4}\)
\(\mathsf{= (6m - 7)(4)}\)
\(\mathsf{= (6m - 7) 4}\)
\(\mathsf{= 4(6m - 7)}\)
\(\mathsf{= 4(6m) - 4(-7)}\)
\(\mathsf{= 6m(4) + (-7)(4)}\)
\(\mathsf{= 6m(4) - 7(4)}\)
\(\mathsf{= 6m - 28}\)
\(\huge\textbf{Therefore, your answer should be:}\)
\(\huge\boxed{\frak{24m - 28}}\huge\checkmark\)
\(\huge\text{Good luck on your assignment \& enjoy your day!}\)
~\(\frak{Amphitrite1040:)}\)
Please help asap! The question is below!
Based on the information, the hedgehogs have made the better offer
How to know who made the better offerThe Turkeys are offering a yearly salary of S(t) = 90000t over the course of eight years. To calculate the present value of each payment, an equation is used:
PV = S(t) * e^(-rt)
The variable "r" denotes a continuous interest rate of 0.03. "t" equals the years from t=0 to the time of payment. By this method, the current value of the Turkeys' offer can be assessed as follows:
PV(Turkeys) = ∫[0,8] 90000t * e^(-0.03t) dt
= 736,918.63
Comparatively, the Hedgehogs propose a yearly salary of S(t) = 80000t for nine years. Utilizing the formula employed in the previous scenario, the following result is derived:
PV(Hedgehogs) = ∫[0,9] 80000t * e^(-0.03t) dt
= 753,472.49
Given these calculations and the presumption that Rogelio may earn a continuous interest rate of 3% on his funds, it would best serve him to accept the Hedgehogs’ item offer since they have offered him a more favorable contract based on the accumulated present value of both contracts.
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Find the value of Q in the following system so that the solution to the system is (2,3).
D) 21
1) In this problem, to satisfy this condition, we need to plug into the 2nd equation that ordered pair.
2) Therefore, we can write out this:
\(\begin{gathered} I)\:x-2y=-4 \\ II)\:3x+5y=Q\Rightarrow3(2)+5(3)=Q\Rightarrow Q=21 \\ \end{gathered}\)3) Thus, the answer is D. 21
robert just got his first job
Answer: Robert is equal to 23 little Roberts
Step-by-step explanation:
Common sense.
wow good job robert hooever that is
Suppose a normal distribution has a mean of 50 and a standard deviation of 3. What is P(x≤ 44)? A. 0.025 B. 0.975 C. 0.84 D. 0.16
A normal distribution has a mean of 50 and a standard deviation of 3 , the probability P(X ≤ 44) = P(Z ≤ -2) = 0.0241 option a) 0.025.
In probability theory, normal distribution is also known as Gaussian distribution. It is a probability distribution that is symmetrical, bell-shaped, and a continuous probability distribution. It's also a part of continuous probability distribution that describes real-valued random variables whose probability density function is affected by two parameters: the mean μ and the variance σ².
Let us consider the problem. Suppose a normal distribution has a mean of 50 and a standard deviation of 3. Firstly, we need to standardize the random variable X that is to convert it to the standard normal distribution. We use the following formula for this Z = (X - μ) / σwhere X is the random variable and μ is the mean, σ is the standard deviation of the population.
So in this case, we can write this as Z = (44 - 50) / 3 = -2
We have now obtained the standard score or standard deviation for the random variable X.
Now we need to calculate the probability P(X ≤ 44) = P(Z ≤ -2).
The probability of Z being less than -2 is denoted by the area under the standard normal curve to the left of Z = -2.
Using the standard normal table we look for the probability that corresponds to -2 and the closest we find is 0.0228.
This probability represents the area under the standard normal distribution to the left of Z = -2.
To calculate the area to the left of Z = -2, we add the area to the left of the next integer, which is -3, which we find from the standard normal table as 0.0013, 0.0228 + 0.0013 = 0.0241.
Therefore, the probability P(X ≤ 44) = P(Z ≤ -2) = 0.0241 or 0.025 (rounded to three decimal places)Therefore, the answer is option A. 0.025.
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please help.
definitions: 1. definition of right triangle
2. definition of isosceles TrianglesReflexive
3. HL
4. definition of perpendicular
5. CPCTC
6. reflexive
From the two column proof below, we have seen ∠BAC ≅ ∠DAC by CPCTC
How to solve two column proof problems?The two column proof to show that ∠BAC ≅ ∠DAC is as follows:
Statement 1: ΔABD is Isosceles with base BD, AC ⊥ BD
Reason 1: Given
Statement 2: AB ≅ AD
Reason 2: Definition of isosceles Triangles
Statement 3: ∠1 and ∠2 are right angles
Reason 3: Definition of perpendicular
Statement 4: AC ≅ AC
Reason 4: Reflexive Property
Statement 5: ΔABC and ΔADC are right triangles
Reason 5: Definition of right triangle
Statement 6: ΔABC ≅ ΔADC
Reason 6: HL Congruency
Statement 7: ∠BAC ≅ ∠DAC
Reason 7: CPCTC
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100
0
-100
8.standard form?
Answer:
899.2/ 900
Step-by-step explanation:
helpppppp , quick answer with work pleaseeee
Answer:
Step-by-step explanation:
\(\sqrt{x-2}+8=x\\\\\sqrt{x-2}=x-8\\\)
Square both sides,
\(x-2=(x-8)^{2}\\\\x-2=x^{2}-2*x*8+8^{2}\\\\x-2=x^{2}-16x+64\\\\x^{2}-16x+64=x-2\\\\x^{2}-16x+64-x+2=0\\\\x^{2}-17x+66=0\)
Sum = - 17
Product = 66
Factors = -6 , -11
x² - 6x -11x + (-6)*(-11) = 0
x(x - 6) -11(x - 6) = 0
(x-6) (x - 11) = 0
x -6 = 0 ; x - 11 = 0
x = 6 ; x =11
Here, x = 6 is a extraneous solution
Karrie’s mom has these flavors of juice boxes in a cooler. 4 grape 6 fruit 10 orange What is the ratio of the number of grape juice boxes to the total number of juice boxes in the cooler?
A. 1:16
B. 1:5
C. 1:4
D. 1:20
the answer is b the ratio would be 4:20 but it is simplified, therefor 1:5
simplify(4-x) (7+x)
(4-x) ( 7+ ×)
28 +4x -7x -x²
28 -3x - x²
Factor the expression. 12a+15=
3
(
4
+
5
)
Step-by-step explanation:
Hello!
Answer:
3(4a+5)
Step-by-step explanation:
Hope this helps :)
Substitute x=2 into the function f(x) = 3 +7e^0.58x Use e=2.72 to calculate your answer and give your answer to 2 decimal place
f(2)=
The value of the function when x = 2 is 33.25.
What is exponential function?A function with the formula f(x) = abˣ is an exponential function. A and b are constants, and b is a positive real integer that is greater than zero. The basis b determines how much the function increases or decreases, and x is the exponent or power that raises the base. The function shows exponential growth if b is bigger than 1, whereas the function shows exponential decline if b is between 0 and 1. Many phenomena, including population expansion, compound interest, radioactive decay, and the spread of infectious illnesses, are modelled using exponential functions.
The given function is \(f(x) = 3 +7e^{0.58x}\).
Substitute the value of x = 2 we have:
\(f(2) = 3 + 7(2.72)^{0.58(2)}= 3 + 7(2.72)^{1.16}\)
= 3 + 7(4.464)
= 33.25
Hence, the value of the function when x = 2 is 33.25.
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solve the inequality y-6>/2y-4
Answer:
Step-by-step explanation:
Let's solve your inequality step-by-step.
y - 6 > 2y - 4
y - 2y > -4 + 6
-y > 2
now divide by -1 and inequality sign changes
-y/-1 < 2/-1
y < -2
what is the missing polynomial?
The missing polynomial is 40 - 4x - 12x²
How to find the missing polynomialThe missing polynomial is solved by comparing the polynomials as done below
? - (20 - 4x - 5x²) = 20 - 7x²
? = 20 - 7x² + (20 - 4x - 5x²)
comparing the terms
constant terms: 20 + 20 = 40
x terms : -4x
x² terms : -7x² - 5x² = -12x²
This can be combined as 40 - 4x - 12x²
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Question 15 pts
A line segment on a graph has endpoints of (-3,1) and (3,1). It is translated 5 units down and then, reflected across the x-axis.
What are the endpoints after the series of transformations?
Group of answer choices
(-3,-4 ) and (3,4)
(-3,-1) and (3,-1)
(-3,4) and (3,4)
(-3,-6) and (3,-6)
Question 25 pts
Between what two integers is the value of the square root of 21?
Group of answer choices
0 and 1
4 and 5
6 and 7
10 and 11
Question 35 pts
A grain of sand has a mass of approximately 6 x 10-2 grams. Earth has a mass of approximately 6 x 1028 grams.
How many times the mass of the grain of sand is the mass of Earth?
Group of answer choices
1 x 10 ^-54
1 x 10 ^-14
1 x 10 ^ 26
1 x 10 ^ 30
Question 45 pts
Jenna wants to hang outdoor stringed lights on her isosceles triangular roof. She wants to cover the base and both sides. The height of her roof is 18 feet and the base is 32 feet.
What is the approximate length, in feet, of lights that she will need?
Group of answer choices
48
64
80
98
Question 55 pts
For a classroom party, there are 12 bottles of fruit punch. Each bottle is filled with 850 cubic centimeters of punch. The fruit punch will be served in cone-shaped paper cups that are 7 centimeters across and 12 centimeters tall.
How many completely full cone-shaped cups of the punch can be poured?
Group of answer choices
16
66
232
265
Question 65 pts
A triangle is formed through the points (-3,1), (-3,4) and (5,1). What is the length of the triangle's hypotenuse.
Group of answer choices
square root of 11
square root of 24
square root of 55
square root of 73
Answer:
The 3rd one for the first and 2nd and 4th and 1st and 3rd and 1st
Step-by-step explanation:
What is the product of 4.5 ⋅ 10^5 and 1.6 ⋅ 10^2?
Answer: 450000, 160
Step-by-step explanation:
4.5 ⋅ 10^5 =
4.5*100000=
4*100000+0.5*100000=
400000+50000=450000
1.6 ⋅ 10^2=
1.6*100=
1*100+0.6*100=
100+60=160
The weight of an organ in adult males has a billship distribution with a mean of 330 g and a standard deviation of 50 g
Using the Empirical Rule, it is found that 99.7% of the weights are between 180 g and 480 g.
What does the Empirical Rule state?It states that, for a normally distributed random variable:
Approximately 68% of the measures are within 1 standard deviation of the mean.Approximately 95% of the measures are within 2 standard deviations of the mean.Approximately 99.7% of the measures are within 3 standard deviations of the mean.Hence, the bounds of the interval containing 99.7% of the weights is given by:
330 - 3 x 50 = 180 g.330 + 3 x 50 = 480 g.More can be learned about the Empirical Rule at https://brainly.com/question/24537145
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answer the question submitted
The function g(x) = 4x² - 28x + 49 can be rewritten as g(x) = 4(x - 7/2)² - 147 after completing the square.
To complete the square for the function g(x) = 4x² - 28x + 49, we follow these steps:
Step 1: Divide the coefficient of x by 2 and square the result.
(Coefficient of x) / 2 = -28/2 = -14
(-14)² = 196
Step 2: Add and subtract the value obtained in Step 1 inside the parentheses.
g(x) = 4x² - 28x + 49
= 4x² - 28x + 196 - 196 + 49
Step 3: Rearrange the terms and factor the perfect square trinomial.
g(x) = (4x² - 28x + 196) - 196 + 49
= 4(x² - 7x + 49) - 147
= 4(x² - 7x + 49) - 147
Step 4: Write the perfect square trinomial as the square of a binomial.
g(x) = 4(x - 7/2)² - 147
Therefore, the function g(x) = 4x² - 28x + 49 can be rewritten as g(x) = 4(x - 7/2)² - 147 after completing the square.
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The probable question may be:
Rewrite the function by completing the square.
g(x)=4x²-28x +49
g(x)= ____ (x+___ )²+____.
247 1372 as a number
Answer:
Do you mean in words?
Step-by-step explanation:
then it is
Two million,four hundred and seventy one thousand,three hundred and seventy two.
WS SAMPLE
Find the area of each sector. Round your answers to the nearest tenth.
13)
60° 10 in
Area of sector would be,
⇒ Area of sector = 102.6 feet squared
We have to given that,
Radius of circle = 14 ft
Angle θ = 60°
Now, We know that,
Area of sector = [θ/360]πr²
Where, r is radius of circle.
Hence, We can substitute all the values, we get;
Area of sector = [θ/360]πr²
Area of sector = [60/360](22/7)(14)²
Area of sector = [1/6][22/7][196]
Area of sector = 102.6 feet squared
Thus, Area of sector would be,
⇒ Area of sector = 102.6 feet squared
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Find the length of the hypotenuse of the right triangle.
Answer:
The length of the hypotenuse is 100.
Step-by-step explanation:
To find the length of the hypotenuse, we use the following formula:
c=\(\sqrt{a^2+b^2}\)
c=\(\sqrt{28^2+96^2}\)
c=\(\sqrt{10,000}\)
c=100
Therefore, the length of the hypotenuse is 100.