You are here:

Calculus/A certain calculus student hit Mr. Leacher

Advertisement

Expert: - 10/8/2008


Question
A certain calculus student hit Mr. Leacher in the head with a snowball. If the
snowball is melting at the rate of 10 cubic feet per minute, at what rate is the radius
changing when the snowball is 1 foot in radius (Problem #1)? At what rate is the
radius changing when the snowball is 2 feet in radius (Problem #2)?
Answers should be expressed in terms of feet per minute.


You already answere this question, but your explanation didnt actually help me finf the asnwer, I got to the last step but couldn't solve it.
10/4*pi*(2)^2    <--- I dont know how to solve that.

Answer
To evaluate 10/4*π*(2)^2 , 10/4=2.5, π=3.1416 (rounded to four places), and 2^2=4.

Take 2.5*π*4, and that should be the answer.  It looks like 10π.

I hope this answers it for you.  If you have any further questions, please right again.

Calculus

All Answers

Answers by Expert:

Ask Experts

Volunteer

Scotto

Expertise

Any kind of calculus question you want. I also have answered some questions in Physics (mass, momentum, falling bodies), Chemistry (charge, reactions, symbols, molecules), and Biology.

Experience

Experience in the area: I have tutored students in all areas of mathematics for over 25 years. Education/Credentials: BSand MS in Mathematics from Oregon State University, where I completed sophomore course in Physics and Chemistry. I received both degrees with high honors. Awards and Honors: I have passed Actuarial tests 100, 110, and 135.

Publications
Maybe not a publication, but I have respond to well oveer 7,500 questions on the PC. Well over 2,000 of them have been in calculus.

Education/Credentials
I aquired well over 40 hours of upper division courses. This was well over the number that were required. I graduated with honors in both my BS and MS degree from Oregon State University. I was allowed to jump into a few junior level courses my sophomore year.

Awards and Honors
I have been nominated as the expert of the month several times. All of my scores right now are at least a 9.8 average (out of 10).

Past/Present Clients
My past clients have been students at OSU, students at the college in South Seattle, referals from a company, friends and aquantenances, people from my church, and people like you from all over the world.

©2012 About.com, a part of The New York Times Company. All rights reserved.