9. [0.68/1.36 Points] DETAILS MY NOTES CRAUDCOLALG6 1.4.EX.012.MI. PREVIOUS ANSWI
The cost of operating a car depends on the gas mileage m that your car gets, the cost g per gallon of gasoline, and the distance d that you drive.
(a) How much does it cost to drive 150 miles if your car gets 21 miles per gallon and gasoline costs 375 cents per gallon? (Round your answer to the nearest
$ 26.79
(b) Find a formula that gives the cost C as a function of m, g, and d. (Let C be measured in dollars, d be measured in miles, g be measured in dollars per gallo
per gallon.)
$$C(m, g, d) = \frac{d}{m} \cdot g$$
(c) Use functional notation to show the cost of driving a car that gets 26 miles per gallon a distance of 187 miles if gasoline costs $4.25 per gallon.
$$C(m, g, d) = C(26, 4.25, 187)$$
Use the formula from Part (b) to calculate the cost. (Round your answer to the nearest cent.)
$ 30.55
x
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10. [1.75/2.1 Points] DETAILS MY NOTES CRAUDCOLALG6 1.4.EX.019. PREVIOUS ANSWERS ASK YOUR TEACHER
You own a motel with 30 rooms and have a pricing structure that encourages rentals of rooms in groups. One room rents for $80.00, two for $78.00 each, and in general t
found by taking $2 off the base of $80 for each extra room rented.
(a) How much money do you charge per room if a group rents 3 rooms?
$76
