Solve the following: 1. A team of climbers must determine the width of a ravine in order to set up equipment to cross it. If the
climbers walk 25 feet along the ravine from their crossing point and sight the crossing point on the far side of
the ravine to be at a 35° angle, to the nearest tenth, how wide is the ravine?

Tom had a total of $220 and he spent $35 on a basketball ticket . what percent of his money did he have left?

An automobile assembly line operation has a scheduled mean completion time, μ, of 12 minutes. the standard deviation of completion times is 1.6 minutes. it is claimed that, under new management, the mean completion time has decreased. to test this claim, a random sample of 33 completion times under new management was taken. the sample had a mean of 11.2 minutes. assume that the population is normally distributed. can we support, at the 0.05 level of significance, the claim that the mean completion time has decreased under new management? assume that the standard deviation of completion times has not changed.

In order to be invited to tutoring or extension activities a students performance 20 point higher or lower than average for the