Statistics Replacement times for CD players are normally distributed with a mean of seven years and the variance of two. Find the replacement time separating the bottom 25% to the top 75%.

How do you convert 1.27 to a percentage

The weekly revenue for a company is r = 3p^2 + 60p + 1060, where p is the price of the company's product. what price will result in a revenue of $1200.

Suppose that sahil knows that 45 people with ages of 18 to 29 voted. without using a calculator, he quickly says then 135 people with ages of 30to 49 voted. is he correct? how might sohil have come up with his answer so quickly?