Question
A circular oil slick is expanding with radius, r in yards, at time t in hours given by r=2.5t−0.3t2, for 0≤t≤10.
Find a formula for the area in square yards, A=f(t), as a function of time.
f(t)=
HELP PLEASE!
Find a formula for the area in square yards, A=f(t), as a function of time.
f(t)=
HELP PLEASE!
Answers
bobpursley
area=PI r^2=PI (2.5t-.3t^2)^2
= pi t^2(6.25-1.5t+.09t^2)
= pi t^2(6.25-1.5t+.09t^2)