B I think not sure ......
(x-3)^2=10
I hope this helps you.
70 pieces
7/10 = x/100
10*10=100
7*10 = 70
70/100
Y = t*e^(-t/2)
y' = t' [e^(-t/2)] + t [e^(-t/2)]' = e^(-t/2) + t[e^(-t/2)][-1/2]=
y' = [e^(-t/2)] [1 - t/2] = (1/2)[e^(-t/2)] [2 - t] = - (1/2) [e^-t/2)] [t -2]
