Solve the equation algebraically.
e^(.05t)=3

T = (ln(3))/.5
ln(e^.05t)=ln(3)0.05t=ln(3)t=ln(3)/(0.05)

You need to divide 210 square inches by 35 inches and that’s going to give you 6 inches and that’s the length of the hypothenuse of the right triangle i hope that this you : )