"For the following, determine the equation of the tangent at the given point:
12b) For the curve defined by (x^2)(e^y)=1 at B(1,0)."
"The number, N, of bacteria in a culture at time t in hours is:
N = 1000[30 + (e^-t/30)]. Find the rate of change of the number of bacteria at time t."
Two different questions, two question I can't solve. Any insight would be appreciated, thanks!