Betsy volunteers at community hospital for 21 hours each week. if there are 168 hours in a week, what percentage of her time does she spend as a volunteer in a week?

Which two undefined geometric terms always describe figures with no beginning or end?

Mr. piper is driving peter, roddy, and scott home from school. all of them want to ride in the front seat. how can he make a fair decision about who rides in the front seat?

Write a function rule for  “the output is  5 less than the input.” let  x be the input and let  y  be the output.