$11.00 × 20 = $220 in 40 hours

Aswimming pool had 2.5 million liters of water in it. some water evaporated, and then the pool only had 22 million liters of water in it. what percent of the water evaporated?

Ellen makes and sells bookmarks. she graphs the number of bookmarks sold compared to the total money earned. why is the rate of change for the function graphed to the left?

If a company produces x units of an item at a cost of $35 apiece the function c=35x is a of the total production costs