The width of a rectangle is a=r-5 and the area is r^3-24r-5. what is the length?

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What is the area of the trapezoid shown ?

The water company charges a residential customer $41 for the first 3,000 gallons of water used and $1 for every 200 gallons used over 3000 gallons. if the water bill was $58 how many gallons of water were usedanswersa 3400 gallonsb 6000 gallonsc 6400 gallons d 7000 gallons