Solve using the formula for exponential growth: How long wil…

Solve using the formula for exponential growth: How long will it take for $4200 to grow to $11,500 at an interest rate of 12.1% if the interest is compounded continuously? Round the number of years to the nearest hundredth (two decimal places).   It will take approximately [blank] years. 

Solve using the formula for exponential growth:     Randy in…

Solve using the formula for exponential growth:     Randy invested his inheritance in an account that paid 6.1% interest, compounded continuously. After 9 years, he found that he now had $58,075.20.  What was the original amount of his inheritance?  Round to the nearest dollar.     Randy’s original inheritance amount was approximately: