We need to choose at least 23 people at random to have a probability greater than 1/2 that at least one of them has a birthday today.
To find the smallest number of people needed to choose at random so that the probability that at least one of them has a birthday today exceeds 1/2, we can use the birthday problem formula:
P(at least one shared birthday) = 1 - P(no shared birthdays)
Assuming that all 365 days in a year are equally likely to be a person's birthday, the probability of two people not sharing a birthday is:
=364/365
The probability that n people all have different birthdays is:
(365/365) * (364/365) * (363/365) * ... * ((365 - n + 1)/365)
So, the probability that at least two people share a birthday is:
1 - (365/365) * (364/365) * (363/365) * ... * ((365 - n + 1)/365)
We want to find the smallest value of n such that this probability exceeds 1/2. By trial and error, we can find that this occurs when n = 23.
Therefore, we need to choose at least 23 people at random to have a probability greater than 1/2 that at least one of them has a birthday today.
To know more about probability refer here:
https://brainly.com/question/30034780?#
SPJ11
Starting with the letter A and counting left
to right,
write the second letter
write the eighth letter
write the third letter
The second letter is B, the eighth letter is H and the third letter is C
When we start to count from left to right starting from letter A,
1st letter is A
2nd letter is B
3rd letter is C
4th letter is D
5th letter is E
6th letter is F
7th letter is G
8th letter is H
9th letter is I
10th letter is J
11th letter is K
12th letter is L
13th letter is M
14th letter is N
15th letter is O
16th letter is P
17th letter is Q
18th letter is R
19th letter is S
20th letter is T
21st letter is U
Thus,
Second letter is B
Eighth letter is H
Third letter is C
To learn more about letter visit: https://brainly.com/question/13943501
#SPJ1
Your friend was solving the equation shown and was confused by the result "-20 = -20." Explain what this result
means.
4(y - 5) - 2y = 6y - 20 - 4y
4y - 20 - 2y = 6y - 20 - 4y
2y - 20 = 2y - 20
-20 = -20
I’ll give {brainiest} pls help me
Answer:
ans will be 7y-5+3
this will be the ans
(-1,2) (-3,-2) slope intercept form
Answer: The slope is 2
Step-by-step explanation: -1 to -3 is -2. 2 to -2 is -4. rise/run. -4/-2=2
A retail sporting goods store estimates that weekly sales s and weekly advertising costs x are related by the equation s = 2250 + 50x + 0.35x2. the current weekly advertising costs are $1500, and these costs are increasing at a rate of $125 per week. find the current rate of change of the weekly sales with respect to time. please show step by step working.
Answer:
To find the current rate of change of the weekly sales with respect to time, we need to find the derivative of the equation s = 2250 + 50x + 0.35x^2 with respect to x and then evaluate it at x = 1500.
The first step is to take the derivative of the equation:
s = 2250 + 50x + 0.35x^2
d(s)/dx = 50 + 0.7x
Next, we need to evaluate the derivative at x = 1500:
d(s)/dx = 50 + 0.7 * 1500 = 50 + 1050 = 1100
So, the current rate of change of the weekly sales with respect to time is 1100 dollars per week. This means that for every $125 increase in the weekly advertising costs, the weekly sales will increase by $1100.
Select all the values of x that make the equation | 3x + 4 | − 9 = 0 true.
A . 1 2/3
B. -1 2/3
C. 4 1/3
D. -4 1/3
E. 5 2/3
F. -5 2/3
\(|3x+4|-9=0\)
Add 9 to both sides:
\(|3x+4|-9+9=0+9\)
\(|3x+4|=9\)
Solve the Absolute Value:
\(3x+4=9or3x+4=-9\)
__________________________________________________________
\(3x+4=9\)
Subtract 4 from both sides:
\(3x+4-4=9-4\)
\(3x=5\)
Divide both sides by 3:
\(\dfrac{3x}{3} =\dfrac{5}{3}\)
\(\fbox{x = $\dfrac{5}{3} $ or 1$\dfrac{2}{3}$}\)
__________________________________________________________
\(3x+4=-9\)
Subtract 4 from both sides:
\(3x+4-4=-9-4\)
\(3x=-13\)
Divide both sides by 3:
\(\dfrac{3x}{3} =\dfrac{-13}{3}\)
\(\fbox{x = $\dfrac{13}{3} $ or -4$\dfrac{1}{3} $}\)
________________________________________________________
\(\fbox{Options A and D}\)
Find the length of the third side. If necessary, round to the nearest tenth.
Answer:
30
Step-by-step explanation:
pythagoras theorem dictates:
a squared plus b squared=c squared
576+324=900
take the square root of that
30
What is one way to simplify variables with many, many levels (or decimal places) when creating a frequency distribution?A. Ignore outliers B. Organize data into class intervals C. Graph each level of the variable individually D. Compute a mean, median, and mode
One way to simplify variables with many levels (or decimal places) when creating a frequency distribution is to organize the data into class intervals (option B).
By grouping the data into intervals, the frequency distribution becomes more manageable and easier to interpret. This process involves dividing the range of values into distinct intervals or categories and then counting the number of observations falling within each interval. Class intervals provide a summary of the data by grouping similar values together, reducing the complexity of individual levels or decimal places.
This simplification technique is particularly useful when dealing with large datasets or continuous variables that have numerous levels or decimal values, allowing for a clearer representation and analysis of the data.
Option B holds true.
Learn more about frequency distribution: https://brainly.com/question/27820465
#SPJ11
in a rhombus, the diffference of the measures of 2 angles between a side and the diagonals is 32 degrees. what are the angless of the rhombus?
To solve this problem, we first need to understand that a rhombus is a quadrilateral with all sides equal in length. Also, the diagonals of a rhombus bisect each other at right angles. Let's assume that the angle between one of the sides and a diagonal is x degrees. Then, the angle between the other diagonal and the same side is 180-x degrees. Since the difference between these two angles is given as 32 degrees, we can set up an equation:
(180-x) - x = 32
Solving this equation, we get:
2x = 148
x = 74
Therefore, the angles of the rhombus are 74 degrees and 106 degrees.
A rhombus is a special type of quadrilateral where all sides are equal in length. Also, the diagonals of a rhombus bisect each other at right angles. In this problem, we are given that the difference of the measures of 2 angles between a side and the diagonals is 32 degrees. To solve for the angles of the rhombus, we need to use the fact that the sum of the interior angles of a quadrilateral is 360 degrees. We assume that one of the angles between a side and a diagonal is x degrees, and set up an equation using the difference given in the problem. Solving this equation gives us the value of x, which allows us to find the other angle.
In a rhombus, the angles between a side and the diagonals are equal. If we are given the difference between these angles, we can use an equation to solve for the measures of these angles. In this problem, we found that the angles of the rhombus are 74 degrees and 106 degrees.
To know more about rhombus visit:
https://brainly.com/question/27870968
#SPJ11
Which of the following equations is equivalent to 4x+2y=12
A. 2x+2y=6
B. 8x+2y=24
C. 2x+y=6
D. 4x+4y=24
Answer:
my answer lies in paper
The times taken by Amal to run three races were 3 minutes 10 seconds, 2 minutes 58.2 seconds and 3 minutes 9.8 seconds. Find the average time taken, giving your answer in minutes.
I need help immediately!!!
The limit as x approaches one is infinity.
\(lim_{x\to1}\frac{x + x {}^{2} + {x}^{3} + ... + {x}^{100} - 1000}{1 - x} =\infty\)
What is the limit of a function?The limit of a function, f(x) as x approaches a given value b, is define as the value that the function f(x) attains as the variable x approaches the given value b.
From the given question, as x approaches 1,
substituting x into 1 - x,
the denominator of the function approaches zero, because 1 - 1 = 0 and thus the function becomes more and more arbitrarily large.
Thus, the limit of the function as x approaches 1 is infinity.
Therefore,
The limit (as x approaches 1)
\(lim_{x\to1}\frac{x + x {}^{2} + {x}^{3} + ... + {x}^{100} - 1000}{1 - x} = \infty \)
Learn more about limits of a function here:
https://brainly.com/question/2393546
#SPJ1
lines A and B are parallel lines cut by a transversal find the value of x
The required value of the x is 13 in the measures of the angle.
Given that,
Line A and B are parallel lines and intersect by a transversal line.
Here,
If a pair of parallel lines intersect by the transversal line then their corresponding angles are equal in measure,
Thus, we get;
8x + 2 = 14x - 76
6x = 78
x = 78 / 6
x = 13
Thus, the required value of the x is 13 in the measures of the angle.
Learn more about lines here:
brainly.com/question/2696693
#SPJ1
2. Shown is the graph of y = f(x). Draw the graph of g(x) = -f(x).
у
Answer:
Step-by-step explanation: add Y to the X and then add -f to X Y and you will get the answers
Add Y to X 2.Get your answer and dived that by -f and u will get you answerGary's parents want him to attend The University of Houston. They opened a college savings account 15 years ago. Today, average yearly tuition and fees for one year at the university are about $10,350. Based on this information, about how much should Gary's parents have saved each of the 15 years to cover the cost of 4 years at The University of Houston?
Answer:
Results are below.
Step-by-step explanation:
Giving the following information:
Today, average yearly tuition and fees for one year at the university are about $10,350.
I will assume a yearly interest rate of 8%.
First, we need to calculate the total amount needed:
Future value (FV)= 10,350*4= $41,400
Now, using the following formula, the annual deposit required:
FV= {A*[(1+i)^n-1]}/i
A= annual deposit
Isolating A:
A= (FV*i)/{[(1+i)^n]-1}
A= (41,400*0.08) / [(1.08^15) - 1]
A= $7,194.22
The rim of a bicycle wheel has a radius of 31.5 cm.
What is the circumference of the rim?
Answer:
197.92
Step-by-step explanation: C=2πr=2*π*31.5≈197.92034
9 is what perent of 45
Answer:
2%
Step-by-step explanation:
Answer:
20%
Step-by-step explanation:
Two alternators are being connected to supply power to a load. After the connection is made, in order to make the added alternator share the load, the input torque to the alternator being added must be
Two alternators are being connected to supply power to a load. After the connection is made, in order to make the added alternator share the load, the input torque to the alternator being added must be increased.
What is supply pοwer?Tο supply pοwer tο a lοad using multiple alternatοrs, the input tοrque tο the added alternatοr shοuld be adjusted tο match the pοwer demand οf the lοad. The added alternatοr shοuld be synchrοnized with the existing alternatοrs and cοnnected in parallel tο share the lοad.
The input tοrque tο the added alternatοr will depend οn the pοwer required by the lοad and the characteristics οf the alternatοrs, such as their pοwer ratings and efficiency. By prοperly adjusting the input tοrque οf the added alternatοr, it can cοntribute tο supplying pοwer tο the lοad alοng with the existing alternatοrs.
Learn more about supply power
https://brainly.com/question/13179707
#SPJ4
this is confusing me because of the 2(x+9) and i am not sure if my answer is right so i just want to double check
In order to find the value of x, consider that the measure of the angle above angle of 142° is equal to the measure of the angle with expression 2(x+9).
Take into account that the sum of the angle of 142° and the angle above it is equal to 180°.
Then, you have:
142 + 2(x + 9) = 180
solve the previous equation for x, as follow:
142 + 2(x + 9) = 180 apply distribution property left side
142 + 2x + 18 = 180 simplify like terms left side
2x + 160 = 180 subtract 160 left side
2x = 180 - 160
2x = 20
x = 20/2
x = 10
Hence. the value of x is 10°
The sum of two numbers is 201 and their difference is 69. Find the
numbers.
Answer:
\(let \: the \: numbers \: be \: x \: and \: y \\ then \\ \)
\(x + y = 201(equation \: 1) \\ x - y = 69(equation \: 2)\)
According to 2nd equation
\(x = 69 + y\)
Putting the value of x in the first equation
\(69 + y + y = 201 \\ \implies \: 69 + 2y = 201 \\ \implies \: 2y = 201 - 69 \\ \implies \: y = \frac{132}{2} \)
\( \implies \: y = 66\)
We know that
\(x = y + 69 \\ \implies \: x = 66 + 69 \\ \implies \: x = 135\)
If you have any doubts you can comment and ask
Answer:
135 and 66
Step-by-step explanation:
Solve the system of equations
Equation 1: x + y = 201
Equation 2: x - y = 69
How much is 2% of 3.50
Answer:
.07
Step-by-step explanation:
3.50 * 2% = .07
or
3.50 * .02 = .07
In the computer game, Steeplechase, you press the "jump" button and the horse makes the jump shown. The highest part of the jump must be directly above the fence or you lose time. Where should this horse be when you press "jump"? Explain your reasoning.
In the computer game Steeplechase, the horse should be directly in front of the fence when you press the "jump" button.
The reason for this is that the highest part of the jump needs to be directly above the fence in order to avoid losing time.
By timing the jump correctly and pressing the button when the horse is in front of the fence, you ensure that the horse clears the obstacle efficiently and minimizes any time penalties.
Know more about Steeplechase here:
https://brainly.com/question/30106259
#SPJ11
Since there is an infinite number of values a continuous random variable can assume, the probability of each individual value is virtually 0. a. True b. False
The statement "Since there is an infinite number of values a continuous random variable can assume, the probability of each individual value is virtually 0" is True
In the case of a continuous random variable, the probability of any individual value is virtually zero because there are infinite possible values that the variable can take.
Instead, we typically deal with probabilities over intervals or ranges of values.
The probability density function (PDF) represents the likelihood of the variable falling within a specific range of values.
Thus, while individual values are possible, their probabilities are infinitesimally small.
To know more about continuous random variable refer here:
https://brainly.com/question/30789758#
#SPJ11
$1500 at 9% for 2 years
Answer:
Step-by-step explanation:
You basicly want to use A=pe^rt to find the amount of money you now have. A is the total amount of money you have after a certian period of time (T) while your money grows at a steady rate (R). (E) is an irrational number 2.71828. (P) is the amount of money you started with. Your precentage is your rate and this means you earn 9% of what you have per year. The way the problem would be set up A=1500(2.71828)^(.09)(2). This problem allows for exponential growth to occur because your two variables are time and the amount you have in that time.
Question 4 Three draws are made without replacement from a box containing 5 tickets; two of which are labeled "1", and one eac labeled, "2", "3" and "4" Find the probability of getting two "1's. 0.3 something else 0.4 0.288 0.16
The probability of getting two "1's" out of three draws without replacement from the box is 0.3, which matches the first option.
How to find the probability of getting three "1's" out of three draws?To find the probability of getting two "1's" out of three draws without replacement from a box containing 5 tickets, we can use the following steps:
Step 1: Determine the total number of possible ways to draw three tickets from the box without replacement. This can be calculated using the formula for combinations:
C(5, 3) = 5! / (3! * 2!) = 10
Step 2: Determine the number of ways to draw two "1's" and one other ticket. There are two "1's" in the box, so we can choose two of them in C(2, 2) = 1 way. The third ticket can be any of the remaining three tickets in the box, so we can choose it in C(3, 1) = 3 ways. Thus, there are 1 x 3 = 3 ways to draw two "1's" and one other ticket.
Step 3: Calculate the probability of getting two "1's" by dividing the number of ways to draw two "1's" and one other ticket by the total number of possible draws:
P(two "1's") = 3 / 10
Therefore, the probability of getting two "1's" out of three draws without replacement from the box is 0.3, which matches the first option.
Learn more about probability
brainly.com/question/30034780
#SPJ11
Help me with this Question Please.
Answer:
\(3 \times \frac{1}{3 } + \frac{1}{2} \times - 12( \frac{1}{3} ) = \frac{1}{3} \)
if 5% of all vehicles travel less than 39.13 m/h and 10% travel more than 73.25 m/h, what are the mean and standard deviation of vehicle speed? (round your answers to three decimal places.) mean standard deviation
The mean is 58.319 m/h and the standard deviation is 11.665 m/h of the vehicle speed if 5% of all vehicles travel less than 39.13 m/h and 10% travel more than 73.25 m/h.
The mean and standard deviation of the vehicle speed can be calculated by using the formula for z-score.
The z-score of measure X can be given as;
Z = X - μ / σ
In this case, 39.13 m/h is the 5th percentile; therefore when X = 39.13, Z has a p-value of 0.05, hence Z = -1.645
Z = X - μ / σ
-1.645 = (39.13 - μ) / σ
39.13 - μ = -1.645σ
μ = 39.13 + 1.645σ
Additionally, 73.25 m/h is the 90th percentile (100 - 10 = 90), therefore when X = 73.25, Z has a p-value of 0.9, hence Z = 1.28
1.28 = (73.25 - μ) / σ
73.25 - μ = 1.28σ
μ = 73.25 - 1.28σ
We can find the standard deviation by equalling both equations as follows;
39.13 + 1.645σ = 73.25 - 1.28σ
1.645σ + 1.28σ = 73.25 - 39.13
2.925σ = 34.12
σ = 34.12/2.925 = 11.665 m/h
Now the mean can be calculated as follows;
μ = 73.25 - 1.28σ
μ = 73.25 - 1.28(11.665)
μ = 58.319 m/h
To learn more about standard deviation; click here:
https://brainly.com/question/28225633
#SPJ4
tìm x,y nguyên tố thỏa mãn:y^2-2x^2=1
Answer:
dx/dy = y/2x
Step-by-step explanation:
-4x × dx/dy = -2y..... that's all
SOMEONE PLZZ ILL GIVE 100 POINTS!
Answer:
The answer is A. And please be my friend
Step-by-step explanation:
\( \sqrt{ \frac{36}{4} } \)
36
4
Step-by-step explanation:
\(\sqrt{36/4} =\)\(\sqrt{36} /\sqrt{4}\)
\(\sqrt{36}=6\)
\(\sqrt{4} =2\)
6/2=3
Hope that helps :)
I need help I don't understand this stuff it is very confusing
3x=y
y=2x+2