How to find the base and height of the triangle

Fredrick designed an experiment in which he spun a spinner 20 times and recorded the results of each spin

Which math sentence can be used to determine if the triangle is a right triangle?

Suppose that a households monthly water bill (in dollars) is a linear function of the amount of water the household uses (in hundreds of cubic feet, hcf). when graphed, the function gives a line with slope of 1.65. if the monthly cost for 13 hcf is $46.10 what is the monthly cost for 19 hcf?