Justin burns 28 calories for every 5 minutes walked. About how many minutes must he walk in order to burn off a 300 calorie cheeseburger?

At a sand and gravel plant, sand is falling off a conveyor and onto a conical pile at a rate of 16 cubic feet per minute. the diameter of the base of the cone is approximately three times the altitude. at what rate is the height of the pile changing when the pile is 12 feet high? (hint: the formula for the volume of a cone is v = 1 3 πr2h.)

Which of the following would be a good name for the function that takes the weight of a box and returns the energy needed to lift it?

What is the best way to answer questions with a x expression in the question. for example 3x + 10x=?