Find LCM a⁴-x⁴,a³-a²x-ax²+x²,a³+ax²-x²-a²x

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

Mon wants to make 5 lbs of the sugar syrup. how much water and how much sugar does he need… …to make 5% syrup?

I’m confused on how to work the pie charts