Kim's teacher decomposed seven eights Kim wanted to decompose seven eight in a different way her work is shown on the quiz what Number should Kim write in the space marked with the question mark

Scrub a dub toothbrushes are $4.00 each. there is a 10% discount, but there is also a 6% sales tax after the discount is applied. what is the new price after tax? round to the nearest penny

The standard deviation for a set of data is 5.5. the mean is 265. what is the margin of error?

Monitors manufactured by tsi electronics have life spans that have a normal distribution with a standard deviation of 1800 hours and a mean life span of 20,000 hours. if a monitor is selected at random, find the probability that the life span of the monitor will be more than 17,659 hours. round your answer to four decimal places.