Calculate the surface area of the 3-D composite figure please!! show how you got the surface area

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?

Solve for x and select the correct answer

Solve 4 ln x=2ln25 a) x=5 b) x=25 c) x=625