7/8 students own a bike . 72 is the difference between the ones that own a bike and ones that do not. how many were surveyed?

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?

Christina can paint 420 square feet in 105 minutes. which unit rate describes the scenario?

When you have 25 numbers, and jake picks 3 random numbers and puts them back, what is the chance bob has of picking those 3 numbers when he picks 6 random numbers (without putting them back)? explain.