The radius of a circle is increased by 10%, Then the area is increased by what percent?

A shirt was marked down 20% the first week and another 20% the next week. What percent of the regular price wa...

In three more years, Sabrina's grandfather will be six times as old as Sabrina was last year. When Sabrina's p...

If 'n' is a positive number, 70% of 'n' is what percent of 700n?

In a certain English class, 1/4 of the number of girls is equal to 1/6 of the total number of students. What i...

A man walks down the road for half an hour at an average speed of 3 miles per hour. He waits 10 minutes for a...

If 4m =9n, what is the value of 7m, in terms of n?