A tree initially measured 40/12 feet tall. Over the next 71/2 years, it grew to a final height of 57 feet. During those 71/2 years, what was the average yearly growth rate of the height of the tree?

Onnie is considering doing some long term investing with money that she inherited. she would like to have $50,000 at the end of 30 years. approximately how much money would lonnie need to put into an account earning 6% interest compounded annually in order to meet her goal?