The radius of a sphere is 7 cm. What is the sphere's volume? Round to the nearest tenth, and use 3.14 for Pie

The line y = x + passes through (−3, 7) and is parallel to y = 4x − 1.

If 1 is divided by the sum of y& 4.the result is equal to 3 divided by 4, find the value of m

Determine the mean and variance of the random variable with the following probability mass function. f(x)=( 729divided by 91) (1 divided by 9) superscript x baseline comma x equals 1,2,3 round your answers to three decimal places (e.g. 98.765).