Factor jm + jn + km + kn.
a) (j + k)(m + n)
b)(j + m)(n + k)
c) (n + j)(k + m)

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.

Point r divides in the ratio 1 : 5. if the coordinates of e and f are (4, 8) and (11, 4), respectively, what are the coordinates of r to two decimal places?

How many square centimeters of wrapping paper will be used to wrap the shoe box?