What is the sum of the terms of the series 4+7+10+...+22

Find the volume of the solid generated when the region bounded by y= x and y= 4√x is revolved about the x-axis the volume of the solid is: (type an exact answer cubic units)

Can someone tell me if this is perpendicular? !

The probability that a tutor will see 0, 1, 2, 3, or 4 students is given below determine the probability distribution's missing value.