What is Lateral surface Area of a cylinder if the radius = 4cm(2²) and the h = 9cm

The lines shown below are parallel. if the green line has a slope of -1, what is the slope of the red line?

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)

1) prove that 731^3−631^3 is divisible by 100 2) prove that 99^3−74^3 is divisible by 25