An amount of 21,000 is borrowed for 5 years at 8.5 interest, compounded annually. If the loan is paid in full at the end of that period, how much must be paid back?

I’m on question 7 it says a covered water tank is in the shape of a cylinder the tank has a 28 inch diameter and a height of 66 inches to the nearest square inch what is the surface area of the water tank

Is a square always, sometimes, or never a parallelogram

Subtract and simplify. (-y^2 – 4y - 8) – (-4y^2 – 6y + 3) show how you got the answer if your answer is right i will mark you