There are 599 people on the tenth night and 4111 if you add all the nights together.
They're all prisms. Hexagonal prism, cube, triangular prism, octagonal prism, and rectangular prism. Each have a quadrilateral for a base.
Answer: see below
Step-by-step explanation:
The charges is always at least $80 just for the plumber to show up. The, it increases by $60/hour.
We represent cost, c in dollars, as below.
part A --> c = 80 + 60h
where h is the number of hours.
For 3 hours work, c = 80 + 60(3) = 80 + 180 = $260
part B --> $260
I hope this helps.
The answer is 80, because that is what you get when you subtract 100 from 180 to get the third angle.