10 x 4 = ? x 11 - 26 ÷ 7 = ? = 1/4 ÷ 10 - 4

With finding limits of multi variable !

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

Which equation can be solved to find one of the missing side lengths in the triangle? cos(60o) = cos(60o) = cos(60o) = cos(60o) = mark this and return