If y varies directly with x and x=4 when, y=20, find k, the constant of variation.

Cone a has a surface area of 384 ft2 and cone b has a surface area of 96 ft? . what is the ratio of their volume?

Tell whether the two rates form a proportion

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