Phillip is building a wheelchair ramp for his grandfather. According to the Americans with Disabilities Act (ADA), the maximum angle of elevation for a manual wheelchair is 8.40. For an electric wheelchair, it is 11.8°. If the distance from the
bottom of the ramp to the base of the building is 100 ft and the length of the ramp is 102 ft, is the ramp safe for neither
wheelchair, only electric or both? Label the triangle and show your work!

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.