The vertices of quadrilateral TRAP are T(-1,1). R(3.4), A(7.2), and P(-1,-4). Use coordinate geometry to prove that TRAP is a trapezoid but not an isosceles trapezoid.

Monthly water bills for a city have a mean of $108.43 and a standard deviation of $36.98. find the probability that a randomly selected bill will have an amount greater than $173, which the city believes might indicate that someone is wasting water. would a bill that size be considered unusual?