The lifespans of a computer manufacturers hard drives are normally distributed with a mean of three years six months in a standard deviation of nine months what is the probability of a randomly selected hard drive from the company lasting between two years three months and

Compare these two waves: the blue and orange waves have the same pitch, but the blue wave is louder. the blue and orange waves have the same volume, but the blue wave has a higher pitch. the orange wave has a higher pitch, but the blue wave is louder. the blue wave has a higher pitch, but the orange wave is louder.

The hawaiian alphabet has 12 letters. how many permutations are posible for each number of letters?

Tim's phone service charges $23.06 plus an additional $0.22 for each text message sent per month. if tim's phone bill was $28.56, which equation could be used to find how many text messages, x, tim sent last month?