How much is 50% of 10 liters of milk

What is the length of the unknown leg in the right triangle ?

In the 30-60-90 triangle below side s has a length of and side r has a length

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?