A Delta 727 traveled 2520 miles with the wind in 4 5 hours and 2160 miles against the wind in the same amount of time
.
Find the speed of the plane in still air and the speed of the
wind

How do you find principle and simple interest

Suppose sat writing scores are normally distributed with a mean of 497 and a standard deviation of 109. a university plans to award scholarships to students whose scores are in the top 2%. what is the minimum score required for the scholarship? round your answer to the nearest whole number, if necessary.

Ana earns 2.5% simple interest on $2,000 in her savings account. she does not make any deposits or withdrawals. after 3 years, how much interest will ana have earned on her savings account?