Company has 2 copy machines. the probability that machine a will break down on a given day is 2%. the probability machine b will break down on a given day is 2.5%. what is the probability both machines will break down on a given day?

I'll give brainliest if you answer right : )

Three cylinders have a volume of 2836 cm^3. cylinder a has a height of 900 cm. cylinder b has a height of 225 cm. cylinder c has a height of 100 cm. find the radius of each cylinder. use 3.14 as an approximate for π

The distribution of the amount of money spent by students for textbooks in a semester is approximately normal in shape with a mean of $235 and a standard deviation of $20. according to the standard deviation rule, how much did almost all (99.7%) of the students spend on textbooks in a semester?