A man climbs on to a wall that is 4.5m high and gains 2450j 0f potential energy.

What is the difference between the predicted value and the actual value

Amachine part consists of a half sphere and a cylinder, as shown in the figure. the total volume of the part is π cubic inches.

What is the value of the discriminant of the quadratic equation -2x = -8x + 8 and what does its value mean about thenumber of real number solutions the equation has?