If the school supply kit regularly cost $25 how much does it cost after the 20% discount

The weight of an object in the water is 7% of its weight out of the water. what is the weight of a 652g object in the water?

Weekly wages at a certain factory are normally distributed with a mean of $400 and a standard deviation of $50. find the probability that a worker selected at random makes between $450 and $500

The area of a rectangle is 10 cm^2. one side of the rectangle is x cm. express the perimeter of the rectangle in terms of x and show that this rectangle cannot have a perimeter of 12 cm. the perimeter of the rectangle in terms of x is __ cm