Write the following ratio in their simplest form 80cm:40cm

Which problem could be  solved  by evaluating the expression  7×(−3)7×-3?

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.

How much is $1200 worth at the end of1 year,if the interest rate is 5.5% is compounded quarterly.