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30 Mar 2024, 22:21
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Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!
Difficulty:
15%
(low)
Question Stats:
99% (01:18) correct
0% (00:00) wrong based on 7 sessions
History
Date
Time
Result
Not Attempted Yet
A car got 33 miles per gallon using gasoline that cost $2.95 per gallon. Approximately what was the cost, in dollars, of the gasoline used in driving the car 350 miles?
A. $10
B. $20
C. $30
D. $40
E. $50
A. $10
B. $20
C. $30
D. $40
E. $50
12 Apr 2024, 16:06
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We do have 33 = 1 gallon and 350 miles = x gallons
Cross multiply and we have \(\frac{350}{33} = 10.6\) gallons
1 gallon is about 3.00 $ * 10.6 we do have 31
C is the answer
Cross multiply and we have \(\frac{350}{33} = 10.6\) gallons
1 gallon is about 3.00 $ * 10.6 we do have 31
C is the answer
22 Jun 2024, 01:40
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Official Explanation
Scanning the answer choices indicates that you can do at least some estimation and still answer confidently. The car used 350/33 gallons of gasoline, so the cost was \((\frac{350}{33})2.95\) dollars. You can estimate the product \((\frac{350}{33})2.95\) by estimating 350/33 a little low, 10, and estimating 2.95 a little high, 3, to get approximately (10)(3) = 30 dollars. You can also use the calculator to compute a more exact answer and then round the answer to the nearest 10 dollars, as suggested by the answer choices. The calculator yields the decimal 31.287…, which rounds to 30 dollars. Thus, the correct answer is Choice C, $30.
Answer: C
Scanning the answer choices indicates that you can do at least some estimation and still answer confidently. The car used 350/33 gallons of gasoline, so the cost was \((\frac{350}{33})2.95\) dollars. You can estimate the product \((\frac{350}{33})2.95\) by estimating 350/33 a little low, 10, and estimating 2.95 a little high, 3, to get approximately (10)(3) = 30 dollars. You can also use the calculator to compute a more exact answer and then round the answer to the nearest 10 dollars, as suggested by the answer choices. The calculator yields the decimal 31.287…, which rounds to 30 dollars. Thus, the correct answer is Choice C, $30.
Answer: C
