I need help with this anyone can help?

Describe a way that someone could estime the length of a book

Write a story that matches with the expression 42x-5 pls hurry

An initial investment of $100 is now valued at $150. the annual interest rate is 5%, compounded continuously. the equation 100e0.05t = 150 represents the situation, where t is the number of years the money has been invested. about how long has the money been invested? use your calculator and round to the nearest whole number. years