The answer is 21 because that’s when I finally touch a goldfish
Answer:
c. how late it is in the evening is a function of the length of time the shutter needs to stay open.
This just wants the derivative which you can solve for.
You can do this using a negative expononet or using ...the rational rule forget its name*.... you shoudl get 9000/(t+12)^2
*Quotient rule
