Create an equation in one variable with atleast four operations

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

Calculate the missing value. round the answer to on decimal place. start with 70, increase it by 21%, and end up with

The random variable x is defined as the number marking the sector in which the arrow lands when the spinner in the diagram is spun once.