please help solve for t   2000000/257000 = e^0.0895t

According to your model, what is the length of the sunspot cycle (in years)? In 1848, Rudolph Wolf determined the length of the sunspot cycle to be 11.1 years. How does your value compare with his?

Solve for X.  37-x^2 = x^2

find the exact solution 40=3(1.15)^t

Express th equation in exponential form.