Find the mean of the distribution shown below.
X
2
3
4
P(X)
0.28
0.24
0.48

The number of revolutions of two pulleys is inversely proportional to their diameters. if a 24-inch diameter pulley making 400 revolutions per minute is belted to an 8-inch diameter pulley, find the number of revolutions per minute of the smaller pulley.

Select the number of ways in which a line and a circle can intersect

Solve each quadratic equation by factoring and using the zero product property. x^2 - 8x + 30 = 3x