Need help with derivatives, if anyone is good at calc lmk. I have 90 minutes.

You should post the problems you're having trouble with.

A dose, D, of a drug causes a temperature change, T, in a patient.
T(D) = D^3(C/4) − (D/3) where C and D are positive.

The average cost per item, C, in dollars, of manufacturing a quantity q of cell phones is given by
C = (a/q)+b , where a and b are positive constants.

A voltage V across a resistance R generates a current C = V/R Suppose a constant voltage of 12 volts is put across a resistance that is decreasing at a rate of 0.2 ohms per second when the resistance is 5 ohms.

is it just me or do i not see any questions here?

it's not just you

They're all the beginnings of problems....with no numbers given or questions asked....lol.