Of all the people that attend movies, 67% are in the 12-29 age group. at one theater, 600600 people attended a showing of a certain movie. how many were in the 12minus−29 age group?

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).

Suppose that the price p (in dollars) and the weekly sales x (in thousands of units) of a certain commodity satisfy the demand equation 4p cubedplusx squaredequals38 comma 400. determine the rate at which sales are changing at a time when xequals80, pequals20, and the price is falling at the rate of $.20 per week.

In a class, there are 12 girls. if the ratio of boys to girls is 5: 4 how many boys are there in the class