A hay rake used by a local farmer originally cost 18,000 depreciates at a constant rate of 6.5% per year. In how many years will the piece of equipment be worth only $7,500?

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.

Aman is 6 feet 3 inches tall. the top of his shadow touches a fire hydrant that is 13 feet 6 inches away. what is the angle of elevation from the base of the fire hydrant to the top of the man's head?

How do you find the circumfrance of a circle?