SOLUTION: A fire has started in a dry open field and is spreading in the form of a circle. If the radius of this circle increases at the rate of 5 ft/min, express the total fire area A as a

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Question 365070: A fire has started in a dry open field and is spreading in the form of a circle. If the radius of this circle increases at the rate of 5 ft/min, express the total fire area A as a function of time t (in minutes).
Please enter your answer without the units.

Answer by ewatrrr(24785) About Me  (Show Source):
You can put this solution on YOUR website!


Hi, 

*Note;  Area of a circle = pi%2Ar%5E2

radius increases at the rate of 5 ft/min

Let t represent the amount of minutes elapsed

A = pi%285t%29%5E2