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Dropdown 1: 27
Dropdown 2: Biopower
Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!
Difficulty:
95%
(hard)
Question Stats:
37% (03:17) correct
63%
(03:00)
wrong
based on 230
sessions
History
Date
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Not Attempted Yet
The charts display the production totals for various biofuel categories in the U.S. bioenergy market, measured in trillions of British thermal units. Total biofuel energy production was 1,364 trillion British thermal units in 2010 and increased to 1,831 trillion British thermal units in 2017.
Select from each drop-down menu the option that creates the most accurate statement, given the information provided.
The percentage of Other Advanced Biofuels production out of the total in 2017 was approximately times the percentage in 2010.
The smallest percentage increase in U.S. bioenergy production from 2010 to 2017 occurred for
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Official Answer
Dropdown 1: 27
Dropdown 2: Biopower
30 Jan 2025, 05:29
Kudos
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Bunuel
Official Solution:
Drop-down 1:
In 2017, Other Advanced Biofuels production accounted for (72/1,831) * 100% of the total production.
In 2010, Other Advanced Biofuels production accounted for (2/1,364) * 100% of the total production.
To determine how many times greater the 2017 percentage was compared to 2010, we calculate:
\(\frac{(\frac{72}{1,831})}{(\frac{2}{1,364})} =\frac{72}{1,831}*\frac{1,364}{2} =36*\frac{1,364}{1,831}\), which is approximately 27.
Drop-down 2:
Evaluating the charts, we identify two candidates for the smallest percentage increase: Conventional Ethanol and Biopower.
Conventional Ethanol increased by \(\frac{1,342 - 1,127}{1,127} * 100 \approx 19\%\).
Biopower increased by \(\frac{214 - 191}{191} * 100 \approx12\%\).
Since 12% is the smallest percentage increase, the least growth occurred for Biopower.
Correct answer:
Dropdown 1: "27"
Dropdown 2: "Biopower"
06 Feb 2025, 20:51
Kudos
Bookmarks
1. The ratio between percentages of Other Advanced Biofuels production in 2017 to 2010 is equal to \(\frac{\frac{Other \ Advanced \ Biofuels \ 2017 \ production}{Total \ 2017 \ production} * 100\%}{\frac{Other \ Advanced \ Biofuels \ 2010 \ production}{Total \ 2010 \ production} * 100\%} = \frac{\frac{72 TBtu}{1831 TBtu}}{\frac{2 TBtu}{1364 TBtu}} \approx 26.82\), which is closest to 27 times.
2. Let's calculate the percentage increases in all of the biofuel categories.
- Conventional Ethanol. \(\frac{1342 - 1127}{1127} * 100\% \approx 19.1\%\).
- Biodiesel. \(\frac{203 - 44}{44} * 100\% \approx 361.4\%\).
- Biopower. \(\frac{214 - 191}{191} * 100\% \approx 12\%\).
- Other Advanced Biofuels. \(\frac{72 - 2}{2} * 100\% = 3500\%\).
The smallest is Biopower.
3. Our answer will be: D1 - 27 and D2 - Biopower.
2. Let's calculate the percentage increases in all of the biofuel categories.
- Conventional Ethanol. \(\frac{1342 - 1127}{1127} * 100\% \approx 19.1\%\).
- Biodiesel. \(\frac{203 - 44}{44} * 100\% \approx 361.4\%\).
- Biopower. \(\frac{214 - 191}{191} * 100\% \approx 12\%\).
- Other Advanced Biofuels. \(\frac{72 - 2}{2} * 100\% = 3500\%\).
The smallest is Biopower.
3. Our answer will be: D1 - 27 and D2 - Biopower.
