Two cars got an oil change at the same auto shop. The shop charges customers for each quart of oil plus a flat fee for labor. Th
e oil change for one car required 5 quarts of oil and cost $24.35. The oil change for the other car required 7 quarts of oil and cost $28.35. How much is the labor fee and how much is each quart of oil?
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Answer:
Step-by-step explanation:
The formula of a volume of a cone:
<em>r</em><em> - radius</em>
<em>H</em><em> - height</em>
We have the diameter <em>2r = 10in → r = 5in</em>, and the height <em>H = 28in.</em>
Substitute: