A 60-foot zip line from a tree to the ground forms a 45° angle of elevation from the ground. How high above the ground is the top of the zip line? Round your answer to the nearest tenth of a foot.

Agrain trader buys the following amounts from three suppliers: 3,200 pounds, 5,100 pounds and 700 pounds. what is the total weight of his purchase?

Rockwell hardness of pins of a certain type is known to have a mean value of 50 and a standard deviation of 1.1. (round your answers to four decimal places.) (a) if the distribution is normal, what is the probability that the sample mean hardness for a random sample of 8 pins is at least 51?

What point is the projection of q on a) r b) s c) t