Quote:
Originally Posted by exitwound
The area of an equilateral triangle is increasing at the rate of 4 inē/min. At what rate is one side increasing when the area is 16inē?
Been working on it for like 5 hours now. Can't figure it out. About to throw someone through a wall.
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1. rate of increase of side length is a function of rate of increase of area
2. area (per se) = 16
3. all sides equal ====> only need to know about any one side
you need the formula to derive the area from the length of a side
then rearrange to focus on side length
differentiate
if non-linear, evaluate the rate at #2 above
& you are done
go for a walk when frustrated
good luck and you can tell your prof. that I did NOT give you the answer.