Which scenario cannot be modeled by a right triangle?
a 13-foot ladder is placed 5 feet away from a wall. the distance from the ground straight up to the top of the wall is 12 feet.
wendy leaves school to go home. she walks 60 yards north and then 80 yards west. she is 10 yards from the school.
the dimensions of a triangular-shaped garden are 28 yards, 53 yards, and 45 yards.
a babylonian writing mentioned a triangle with side lengths 120, 169, and 119.

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.