Math7 Ep #18-26, Page 149-150
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19. $240 to $320(Don't forget to write increase or decrease) -- spelling matters!
About This Quiz
This quiz, titled 'Math7 EP #18-26, page 149-150', assesses students' understanding of percentage increases and decreases through real-life scenarios like sales predictions and changes in quantities. It focuses on practical applications and rounding skills, enhancing learners' ability to handle everyday math problems.
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20. 624 feet to 702 feet(Don't forget to write increase or decrease) -- spelling matters!
Explanation
The given correct answer states that there was an increase of 13 feet and a 13% increase in height. This means that the height went from 624 feet to 702 feet, resulting in both a numerical increase of 13 feet and a relative increase of 13% in comparison to the original height.Rate this question:
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23. Eva estimates that 475 songs will fit on her MP3 player. The actual amount of songs that it fits is 380. Find the percent error.
Explanation
The percent error can be found by taking the absolute difference between the estimated and actual values, dividing it by the actual value, and then multiplying by 100. In this case, the absolute difference is 475 - 380 = 95. Dividing 95 by 380 gives 0.25, and multiplying by 100 gives 25%. Therefore, the percent error is 25.25%.Rate this question:
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24. The table shoes Catalina's babysitting hours. She charges $6.50 per hour. Write a sentence that compares the percent of change in the amount of money from April to May and the percent of change from May to June. Round to the nearest percent if needed.
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The amount from April to May is greater
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The amount from May to June is greater
Correct Answer
A. The amount from May to June is greaterExplanation
The correct answer is "The amount from May to June is greater" because it implies that the percentage increase in the amount of money from May to June is greater than the percentage increase from April to May.Rate this question:
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21b. Find the percent of change from 2006 to 2008. Round to the nearest tenth of a percent. Is it an increase or decrease?
Correct Answer
2.9% decrease
2.9 decreaseExplanation
The percent of change from 2006 to 2008 is a 2.9% decrease. This means that the value decreased by 2.9% from 2006 to 2008. The "2.9 decrease" option is not correct because it does not specify the unit of measurement (percentage) and it does not indicate whether it is an increase or decrease.Rate this question:
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18. 48 notebooks to 14 notebooks(Don't forget to write increase or decrease) -- spelling matters!
Correct Answer
71 decrease
71% decreaseExplanation
The given correct answer is "71 decrease, 71% decrease." This means that the number of notebooks has decreased by 71, which is also equivalent to a decrease of 71% from the original quantity of 48 notebooks.Rate this question:
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21a. Find the percent of change from 2008 to 2012. Round to the nearest tenth of a percent. Is it an increase or decrease?
Correct Answer
3.8% increase
3.8 increaseExplanation
The correct answer is 3.8% increase. This means that there was a 3.8% increase from 2008 to 2012. It indicates that the value or quantity being measured has gone up by 3.8%. The answer "3.8 increase" is not correct because it does not specify the unit of measurement or indicate whether it is an increase or decrease.Rate this question:
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25 (Part 1). Dario increased his savings from $350 to $413, while Monica increase her savings from $225 to $270. Fill in the statement:_____ had a higher percent of increase in savings. The difference in the percents of increase is _____.
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Dario; 5%
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Monica; 12%
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Monica; 2%
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Dario; 18%
Correct Answer
A. Monica; 2%Explanation
Monica had a higher percent of increase in savings compared to Dario. The difference in the percents of increase is 2%.Rate this question:
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22. Shoe sales for a certain company were $25.9 billion. Sales are expected to increase about 20% in the next year. Find the projected amount of show sales next year.
Correct Answer
$31 billion
31 billion
$31,000,000,000
31,000,000,000
31
$31Explanation
The projected amount of shoe sales next year is $31 billion. This is found by taking the current sales of $25.9 billion and increasing it by 20%.Rate this question:
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Mar 20, 2023Quiz Edited by
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Nov 27, 2015Quiz Created by
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