Dr. sox paid $1580 for a new computer system. she also paid a 6.5% sales tax. how much was the tax?

5500 dollars is placed in an account with an annual interest rate of 6.5%. to the nearest tenth of a year, how long will it take for the account value to reach 19700 dollars?

Consider the set of all four-digit positive integers less than 2000 whose digits have a sum of 24. what is the median of this set of integers?

Peter measures the angles in a triangle. he finds that the angles are 95, 10 and 75. is he correct? explain your answer