Which expression is equivalent to (1/2(cos(pi/5)+ I sin(pi/5)))^5?

What is the exact volume of the cylinder? 16in going into the middle of the top of the cylinder and 40in in height a) 25,600(pi)3 b)10,240(pi)3 c)1280(pi)3 d)640(pi)3

Enter the missing numbers in the boxes to complete the table of equivalent ratios of lengths to widths. ? 18 8 ? 10 30 12 ?

Write the point-slope form of the line passing through (2, -12) and parallel to y=3x.