The number of revolutions made by a bicycle wheel of 28-inch diameter in travelling 1/2 mile is closest to: (A) 720
(B) 180
C) 360
D) 120

What number should be added to the expression x^2+3x+ in order to create a perfect square trinomial? 3/2 3 9/4 9

1mile equals approximately 1.6 kilometers. which best approximates the number of miles in 6 kilometers?

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.