The probability of two machines each independently working successfully are 0.8 and 0.9. What is the probability of only one machine operating successfully at a time?

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?

The volume of a cube is 8 in to the 3rd power. how long is each side?

Ateacher noticed 5/8 of the students were wearing either blue shorts or white shorts. write two different ways this could be done.