Write your answer in simplest radical form.​

Agreeting card company can produce a box of cards for $7.50. if the initial investment by the company was $50,000, how many boxes of cards must be produced before the average cost per box falls to $10.50?

Acircle has a circumference of 28.36 units what is the diameter of the circle

The difference of two numbers is 40. find the numbers if 0.3 parts of one number is equal to 37.5% of the other one.