Help please :) . :)

Which of the following expressions is equal to 2x^2+8

At 6 1/2 cents per pound of string beans how much does 7 pounds cost

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.