Asked by Chris P Bacon

A forest fire leaves behind an area of grass burned in an expanding circular pattern. The radius of the circle of burning grass is increasing with time according to the formula r(t)= 1t+5. What function expresses the area burned as a function of time t in minutes?

A(t)=?

Answers

Answered by oobleck
A(t) = πr^2 = π(t+5)^2

odd that you wrote "1t" -- is that what you meant?
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