01/14/24

Does a solid, like a night stand, vibrate macroscopically because the atoms and molecules that make up the solid vibrate?
We know particles that make up solids vibrate, but do the solids vibrate themselves because of that? Like a structure or object like a night stand, does that night stand vibrate macroscopically... more
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01/14/24

answer question

The rate r at which a disease spreads in a population of size P is jointly proportional to the number x of infected people and the number P − x who are not infected. An infection erupts in a small... more
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03/09/23

steps on how to figure this problem
A political candidate has asked you to conduct a poll to determine what percentage of people support her.If the candidate only wants a 10% margin of error at a 99% confidence level, what size of... more
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03/09/23

population variance can you give me a hint how to do this, have a clue but not sure.
Approximate the population variance and standard deviation given the following frequency distribution:Class Frequency ... more
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03/08/23

Find the equivalent resistance of the circuit shown in the figure below where R = 6.1 .
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03/08/23

two balls are randomly selected with replacement from a jar that contains seven red and three white balls. The number x of red balls is recorded.
If the experiment is binomial, give the values of n and p. (If the experiment is not binomial enter NONE.)
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05/30/22

Why does folding a piece of paper allow it to hold more weight?
In this video: https://youtu.be/Ra_LM93R-Lk ,why does folding up the sides of the paper to make thicker walls on the bridge make the bridge so much stronger?
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10/13/20

Physics Inclined Plane Question w/ Friction

A block with mass m1 is placed on an inclined plane with slope angle α and is connected to a second hanging block that has mass m2 by a cord passing over a small, frictionless pulley. The... more
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02/19/20

Binomial Probability Distribution
Assume that when adults with smartphones are randomly​ selected, 53​% use them in meetings or classes. If 10 adult smartphone users are randomly​ selected, find the probability that fewer than 3 of... more
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02/18/20

Finite Homework Help, Conditional Probability

A and B are a subset of S, Pr[A|B]=4/9, Pr[A]=9/20, Pr[B']=11/20, what is Pr[B|A']?
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02/12/20

The displacement (in meters) of a particle moving in a straight line is given by s = 5/t2, where t is measured in seconds. Find the velocity of the particle at times t = a, t = 1, t = 2, and t = 3.
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02/12/20

Find the length of Vector A+B given the length of vector A, the length of vector B and the angle between them
Suppose that the length of vector A, [[A]] = 4, the length of vector B, [[B]] =√3, the angle between them is Pi/6. Find the length of A+B, [[A+B]]
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02/12/20

Advanced Placement Statistics
Cassandra's Cogs states in its advertisement that 90% of its orders are ready to ship within three working days. A simple random sample of 100 of the 2,500 orders received during the past month are... more
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01/07/20

Math question help
Construct a 95​% confidence interval of the population proportion using the given information.x=45, n=150The lower bound is The upper bound is
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01/06/20

A bag contains four fair coins and one biased coin that comes up heads with probability 3/4. Assume that you randomly select a coin from the bag and toss it.
(a) Draw a tree diagram representing the situation. (b) What is the probability that the coin comes up heads? (c) If the coin comes up heads, what is the probability that it is fair? Assume instead... more
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12/15/19

Careers in science: The General Social Survey asked 514 people whether they had ever considered a career in science, and 178 said that they had
Careers in science: The General Social Survey asked 514 people whether they had ever considered a career in science, and 178 said that they had. Can you conclude that more than 30% of people have... more
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12/09/19

accumulated value
.Find the accumulated value at the end of 10 years of 4 payments of £200 each payable half yearly in advance, if the interest rate is:(a) 3% per annum effective. (b) 5% per annum convertible monthly. more
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12/02/19

Moment Generating Function

Let X has a probability density function f(x) = k/(a-b) ; a<x<bf(x)= 0 elsewhere how do we find the moment generating function of Y= 10X+3
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04/09/18

If the company charges this customer an annual premium of $270, what is the company's expected value of this insurance policy?
Based on historical data, an insurance company estimates that a particular customer has a 3.2% likelihood of having an accident in the next year, with the average insurance payout being $2200.If... more
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10/14/14

Find the company's expected earnings per policy.
An insurance company is going to sell 1-year life insurance policies with a face value of $40,000 to 25 year old men for $5000. Their mortality tables show that such men will live for 1 year with... more
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