You deposit $500 in an account that pays 4% annual interest what is the balance after 10 years if it is compounded semiannually.

The cost of using a service is $0.25 per min. what equation correctly represents the total cost c, in dollars, for d days of use?

You are standing next to a really big circular lake. you want to measure the diameter of the lake, but you don't want to have to swim across with a measuring tape! you decide to walk around the perimeter of the lake and measure its circumference, and find that it's 400\pi\text{ m}400? m. what is the diameter dd of the lake?

There were 25 students who answered to a survey about sports. four-fifths of them like football. how many students like football?