Which of the following statements contain a variable? Check all that apply. A. There are 3 periods in a hockey game.
B. The plane departs at 2 o'clock.
C. The length of a song on the radio.
D. Bob is half the weight of his dad.

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.

Write the following as a base and exponent

During the election for class president, 40% of the students voted for kellen, and 60% of the students voted for robbie. 500 students voted in total. how many more students voted for robbie than for kellen? answer with work : )