If the total cost to produce 2x * y ^ 3 number of widgets is 16x ^ 3 * y ^ 2 dollars , what expression represents the cost of a single widget

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

Afactory buys 10% of its components from suppliers b and the rest from supplier c. it is known that 6% of the components it buys are faulty. of the components brought from suppliers a,9% are faulty and of the components bought from suppliers b, 3% are faulty. find the percentage of components bought from supplier c that are faulty.

Petes dog weighed 30 pounds it then lost 16% of it's weight how much did pete lose