07/31/19

exponential question
e2x+1 + 9ex - 11 = 0
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07/29/19

If 1990 could be considered year zero, which of the above numbers represents the slope and which represents the y intercept?
The USDA reported that in 1990 each person in the United States consumed an average of 133 pounds of natural sweeteners. They also claim this amount has decreased by about 0.6 pounds each year.If... more
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07/25/19

Random Variable

Probability Scores 0.05 0 0.05 3 0.15 5 0.05 7 0.15 9 0.35 11 0.2 13 Find the expected value of the above random variable
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07/24/19

How to find tan(2x)
If cos x= 21/29, 0° < x < 90°, what is tan(2x)?
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07/24/19

Probability Distribution

A group of people were asked if they had run a red light in the last year where 169 responded "yes," and 491 responded "no." If a person is randomly chosen, find the probability that he/she has run... more
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07/24/19

A group of people were asked if they owned a dog. 205 responded "yes", and 273 responded "no". Find the probability that if a person is chosen at random, they own a dog.
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07/19/19

% Chance / Probability of multiple events occuring 1.5 times or more. Baseball Question!
I have the data, and the answer, but can't figure out the math driving it. Baseball Hitter has a x% chance of meeting or exceeding 1.5 hits,rbis,and runs in a game (think player proposition bets... more
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07/16/19

F and H are sets of real numbers defined as follows.

F= {z│z ≤ 3}H= {z│z > 6}Write F U H and F ∩ H using interval notation. If the set is empty, write Ø
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07/15/19

If P(E and F)=.392, P(E/F)=.56 and P(F/E)=.7, then find the following

A) P(E)=B)P(F)=C)P(E or F)=
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07/15/19

Help please statistics
1A - Candidate Ames and Candidate Burton are both running for mayor in a small town. Early polling results for Candidate Ames are displayed below. Calculate the absolute and relative change in the... more
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07/15/19

To what Celsius temperature must 1.50 atm of hydrogen gas at 16.3°C be changed so the pressure will be 2.18 atm? Assume the volume and the amount of gas are held constant.
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07/14/19

Calculus Question
Find the area of the region inside the cardiod r=2+2cos∅ and outside the circle r=3
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07/14/19

parabola equation
An observatory has a large antenna to collect signals from space. The antenna has a curved surface with a parabolic cross section, and a microphone is located at the focus of the parabola. The... more
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07/14/19

parabola equation

  A spotlight uses a parabolic reflector, a surface with a parabolic cross section, and a light bulb at the focus of the parabola. If the bulb is 5.5 inches from the vertex of the reflector, what... more
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07/14/19

In triangle ABC,m<A=44°, m<B=48°, and a=25. Find "c" to the nearest tenth.

A. 18.6B. 48.1C. 36.0D. 52.6
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07/13/19

What does it mean that the probability density function is proportional to a function?
I'm studying for SOA/CAS Exam P and I have a problem that says that $X$ is a continuous and positive random variable whose probability density function is proportional to: $$\\frac{1}{(1+x)^5}$$... more
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07/13/19

What is the half year life of a radioactive material?
Find the half-life of a radioactive material if after 1 year 99.69% of the initial amount remains. (Round your answer to one decimal place.)
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07/12/19

Chemistry lost.

A particular sample of neon gas has a pressure of 13.2 atm and volume of 2.0 L. What will the new pressure be of the sample of neon if the container's volume is expanded to 3.0 L?
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07/11/19

If the graph of the function g defined by g(x)= -x^2-7 is translated vertically upward by 8 units, it becomes the graph of a function h. Find the expression for h(x).

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07/10/19

Size of a certain
The size of a certain insect is given by p(t)= 500e .03t, where t is measured in days . What time will the population equal 2000?
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07/10/19

Conservation of Energy 3
If a roller coaster begins at rest at the top of a hill, and at the bottom of the hill is moving at 16 m/s, how tall was the hill?
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07/07/19

Is every symmetric positive semi-definite matrix a covariance of some multivariate distribution?
One can easily prove that every [covariance matrix](http://en.wikipedia.org/wiki/Covariance_matrix) is [positive semi-definite](http://en.wikipedia.org/wiki/Positive-definite_matrix). I come across... more
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07/04/19

Poisson distribution

 A hospital director who has been studying daily emergency admission over 7 years has concluded that they are distributed according to the Poisson law, hospital records reveals that emergency... more
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07/01/19

The radius r of a circle is increasing at a rate of 3 inches per minute. Find the rate of change of the area when r = 5 inches and r = 22 inches.?
The radius r of a circle is increasing at a rate of 3 inches per minute. Find the rate of change of the area when r = 5 inches and r = 22 inches.
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06/30/19

Learning Friction #4
A 2 kg box sits on a table where the coefficient of friction is 0.2. A 20 N horizontal force pulls the box to the right. Find the acceleration. 
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