Why is the first stage of a large roller coaster (which usually takes the riders up a large incline) assisted by a chain under the roller coaster carts?.

Aplan that covers all qualified higer education expenses is known as a

What is 7/81 as a percentage? round your answer to the nearest tenth of a percent.

Lois and clark own a company that sells wagons. the amount they pay each of their sales employees (in dollars) is given by the expression 12h+30w12h+30w12, h, plus, 30, w where hhh is the number of hours worked and the number of wagons sold. what is the amount paid to an employee who works 666 hours and sells 333 wagons?