Ira S.

This is what I wrote but I'm not sure where I went wrong: When trying to find the Rational Zero Theorem of a function you must write in descending order and must be in the form of p/q. P is a... more

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Other

01/02/17

Distribution

A distribution has a mean of 50 and a standard deviation of 12.If we assume the above distribution is bell-shaped and symmetric what percentage of the observations will be between 26 and 74?

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Calculus

12/18/16

The mad scientist Dr. Experimento has decided to change the strength of gravity so that it will take 1 minute for a stone dropped from rest to fall 10 feet. Assume that the force of gravity gives... more

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Other

12/14/16

application of rational equations

The speed of the current in a river is 22 miles per hour. A boat travels 99 miles downstream (with the current) in this river in the same time that it travels 55 miles upstream (against the... more

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Precalculus

12/07/16

Parabolic Arcs

A parabolic reflector is in the shape made by revolving an arc of a parabola, starting at the vertex, about the axis of the parabola. If the focus is 9 inches from the vertex, and the parabolic arc... more

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Math Statistics Probability

12/07/16

A Probability Question (Squash Game)

A squash game consists of rallies problem. (Question):- Notes:- P(A wins) = ra / (ra+rb), wins a point in a rally 0 < ra ≤ 100 Suppose player (A) has ability ra = 60 and... more

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Calculus Proofs Proof

12/06/16

Prove (x^5)+(e^x)=0 has at most 1 real root

I know to like assume that (x^5)+(e^x)=0 has two distinct roots and then find the contradiction. But am stuck.

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Integral Calculus Definite Integration

12/06/16

Find the interval [a,b] for which the value of the following integral is a maximum and explain the reasoning

∫ba (2+x-x2)dx

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Worded Problem College Algebra

12/02/16

the sum of two numbers is 54. if the larger is divided by the smaller. the quotient is 2 and the remainder is 3. find the number.

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Solving Equations

12/02/16

Max is 33. Suzanne's age (in years) is twice his age. He wondered on which birthday his age was 1/4 of her age (in years)?

Use an equation to solve this problem, and provide an explanation

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Bye G\\

12/02/16

Japan's GDP per capita is extremely high but their GDP growth rate shows their economy is shrinking. Why might this be the case?

111112hhakgfdjhgafhfghdjagfkdjhgfahjdfgkdfgjdafgajhdfgjdahfkgdhjkagfhjkdgfjhgasdhfgdhgafdhjkgfhdga

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Business Calculus

12/01/16

The demand function for a certain brand of CD is given by p = −0.01x^2 − 0.2x + 13 where p is the unit price in dollars and x is the quantity demanded each week

The demand function for a certain brand of CD is given byp = −0.01x^2 − 0.2x + 13where p is the unit price in dollars and x is the quantity demanded each week, measured in units of a thousand. The... more

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Algorithm

11/28/16

A certain radioactive isotope has leaked into a stream

A certain radioactive isotope has leaked into a small stream. Two hundred days after the leak, 8% of the original amount of the substance remained. Determine the half-life of this radioactive... more

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Deviations

11/28/16

Question on deviations from the mean

If a class of 27 students has a mean score of 72 on a test, what is the sum of the 27 deviations of the scores from 72?

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Precalculus

11/28/16

Ferris wheel has a diameter of 56 feet and turns at 4 revolutions per minute with its lowest point 7 feet above the ground. . Write an equation for h(t).

Assume that the height (h) above the ground of Jack and Jill is a sinusoidal function of time (t in seconds), and it takes 6 seconds after the stopwatch is started for them to reach the top of the... more

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Calculus Cal

11/20/16

Sliding ladder related rates ( finding velocity at t=1)

A 5m ladder leans against a wall . The bottom of the ladder is 1.5m from the wall at time t=0 and slides away from the wall at a rate pf 0.8m/s. Find the velocity of the top of the ladder at time t=1 more

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Other

11/16/16

A colony of 5 bacteria doubles in size every 150 hours. What will the population be 450 hours from now?

I DONT GET HOW EXPONENTIAL GROTH AND DECAY WORKS I NEED SOME HELP PLEASE....

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Math Word Problem

11/16/16

A solution of 24 gallons is 50% acidic. It was combined using a solution that is 20% acidic and another that is 70% acidic. How much is used of each solution?

Kelly, a chemist, was asked to prepare 24 gallons of a solution that is 50% acidic by mixing a solution that is 20% acidic with another solution that is 70% acidic. How much of each solution should... more

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Do Not Use Algebra

11/16/16

the ratio of the number of vans in a parking lot was 5:2. After 1/3 of the cars left, there were 16 more cars than vans in the parking lot.

How many vans were in the parking lot?

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7th Grade Math

11/16/16

500 students take french, 230 take spanish. 33 more students take french year, 2 less take spanish. how many years before there are 3x french vs spanish

There are 500 students taking french and only 230 taking spanish. each year 33 students take french and each year 2 students drop spanish.how many years will pass before there are three times the... more

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Alegbra

11/14/16

I need help with the below word problem

Country A has a growth rate of 2.4% per year. The population is currently 5,591,000, and the land area of Country A is 13,000,000,000 square yards. Assuming this growth continues and is... more

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Can Julia cut a triangular patch for a quilt that has side lengths of 1 1/2 inches, 2 inches, and 4 inches?

Rewrite y=(1.4)^t+8 in the form y=a(1+r)^t

If the supplement of the complement of an angle is fifteen less than twice the supplement of the angle, find the complement of the angle

What is the speed of a car traveling 144 km in 90 minutes in kilometers per hour?

Use the Rational Zeros Theorem to write a list of all possible rational zeros of the function. f(x) = 2x3 + 8x2 + 7x - 8

Distribution

Calculus Question

application of rational equations

Parabolic Arcs

A Probability Question (Squash Game)

Prove (x^5)+(e^x)=0 has at most 1 real root

Find the interval [a,b] for which the value of the following integral is a maximum and explain the reasoning

the sum of two numbers is 54. if the larger is divided by the smaller. the quotient is 2 and the remainder is 3. find the number.

Max is 33. Suzanne's age (in years) is twice his age. He wondered on which birthday his age was 1/4 of her age (in years)?

Japan's GDP per capita is extremely high but their GDP growth rate shows their economy is shrinking. Why might this be the case?

The demand function for a certain brand of CD is given by p = −0.01x^2 − 0.2x + 13 where p is the unit price in dollars and x is the quantity demanded each week

A certain radioactive isotope has leaked into a stream

Question on deviations from the mean

Ferris wheel has a diameter of 56 feet and turns at 4 revolutions per minute with its lowest point 7 feet above the ground. . Write an equation for h(t).

Sliding ladder related rates ( finding velocity at t=1)

A colony of 5 bacteria doubles in size every 150 hours. What will the population be 450 hours from now?

A solution of 24 gallons is 50% acidic. It was combined using a solution that is 20% acidic and another that is 70% acidic. How much is used of each solution?

the ratio of the number of vans in a parking lot was 5:2. After 1/3 of the cars left, there were 16 more cars than vans in the parking lot.

500 students take french, 230 take spanish. 33 more students take french year, 2 less take spanish. how many years before there are 3x french vs spanish

I need help with the below word problem

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