Ashley, Tamira, and Suzy bought school supplies. Each person spent between $12 and $15. Ashley bought 3 items. Tamira bought 4 items. Suzy bought 5 items.

Monthly water bills for a city have a mean of $108.43 and a standard deviation of $32.09. find the probability that a randomly selected bill will have an amount greater than $155, which the city believes might indicate that someone is wasting water. would a bill that size be considered unusual?

Find the area of the triangle shown 3 by 6

The areas of two similar triangles are 72dm2 and 50dm2. the sum of their perimeters is 226dm. what is the perimeter of each of these triangles?