Mathematics, 14.02.2021 14:00 ratpizza
A competitive knitter is knitting a circular place mat. The radius of the mat is given by the formula
363
r(t) = 3 -
with r in centimeters and t in seconds.
(t + 11)
A. Find the rate at which the area of the mat is increasing.
Select an answer
B. Use your expression to find the rate at which the area is expanding at t = 5.
Round your answer to 2 decimal(s).
Select an answer
Answers: 3
![\frac{dA}{dt}=2.\pi.r.[\frac{726}{(t+11)^{3}}]](/tpl/images/1118/8133/000d3.png)
![\frac{dA}{dt}=2.\pi.[3-\frac{363}{(t+11)^{2}}].\frac{726}{(t+11)^{3}}](/tpl/images/1118/8133/9c377.png)
.
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A competitive knitter is knitting a circular place mat. The radius of the mat is given by the formul...
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