Principal = $8100; rate = 17%; time = 7 years what is the total amount after the interest is paid?

Jack did 3/5 of all problems on his weekend homework before sunday. on sunday he solved 1/3 of what was left and the last 4 problems. how many problems were assigned for the weekend?

Micheal is 4 times as old as brandon and is also 27 years older than brandon. how old is micheal

Which of these figures must be a rectangle?