What is the height of a rectangular prism that has a volume of 280 cubic meters , a length of 8 meters, and width of 7 meters?

Me because some of question i don’t understand

The width of a rectangle is 20 units. can the perimeter p of the rectangle be 64 units when its length x is 11 units? no, because p = 2x + 2(20) no, because p ≠ 2x + 2(20) yes, because p ≠ 2x + 2(20) yes, because p = 2x + 2(20)

Assume that y varies inversely with x. if y=1.6 when x=0.5 find x when y=3.2