What is the exact volume of a cylinder 5in 9in

Given that de, df, and ef are midsegments of △abc, and de=3.2 feet, ef=4 feet, and df=2.4 feet, the perimeter of △abc is .

Diane owes $387 to her brother. if she debits her bank account $161.25 a month to pay him back, how many months will it take her to pay off the debt?

Choose the correct slope of the line that passes through the points (1, -3) and (3, -5)