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ACC Quiz #3 - Unit 1 - Key

ACC Quiz #3 - Unit 1 - Key

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ACC Quiz #3 - Unit 1 - Key

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  1. ACCUPLACER® Module #1 - Arithmetic Quiz #3 - Key

  2. NAME: _______________ QUIZ #3 SHOW your work!! No Calculator. Use extra space provided. CLEARLY mark your answers. 1. A biologist has captured two kinds of snakes, ring necks and garters. If she as 6 ring neck snakes and 13 snakes total, how many garter snakes does she have? A. 6 B. 7 C. 13 D. 18 B. The correct solution is 7. Since the biologist has only ring neck and garters, any snake in her possession is a garter if it is not a ring neck. Because she has 13 snakes but 6 ring neck snakes, the number of garter snakes is the difference: 13 - 6 = 7. 2. Place the following numbers in order from greatest to least: 5, -12, 0. A. 0, 5, -12 B. 12, 5, 0 C. 5, 0, -12 D. -12, 0, 5 C. The correct solution is 5, 0, -12. Use the number line to order the numbers. Note that the question says from greatest to least. 3. What is 96 ÷ 12? A. 8 B. 84 C. 960 D. 1,152 A. Use the division algorithm. Knowing the multiplication table well helps you recognize the numbers. 4. Given an expression with no parentheses, which should be evaluated first? A. Division B. Addition C. Subtraction D. Any of the above The order of operations PEMDAS requires division before addition and subtraction.

  3. 5. Which fraction is the least? 1 4 1 2 A. B. 5 3 8 C. D. 16 A. The correct solution is 1 4 because it has the smallest numerator when comparing to the other fractions with the same denominator. The fractions with a common denominator of 16 are 1 4 16 2 4 , 1 8 , 5 16 5 , 3 6     . 16 16 8 16 13 6. Change 720to a decimal. A. 7.55 B. 7.6 C. 7.65 D. 7.7 C. The correct answer is 7.65 because 13 20   . 13.00 20 0.65 7. A basketball player scores 18, 17, 20, 23, 15, 24, 22, 28, 5 points. What is the effect of removing the outlier on the mean and standard deviation? A. The mean and standard deviation increase. B. The mean and standard deviation decrease. C. The standard deviation increase, but the mean decreases. D. The standard deviation decreases, but the mean increases. D. The correct solution is the standard deviation decreases, but the mean increases. The standard deviation decreases from 6.226 to 3.951 when the outlier is removed. The mean increases from 19.11 to 20.88 because the outlier, 5, is the lowest value.

  4. 1 5 35 8 8. Multiply x A. 1 B. 2 C. 3 D. 4 B. The correct solution is 2 because 16 5 80 40   2 x 5 8 9. Multiply 3 4 7 x 16 3 28 1 9 A. B. 1 6 7 9 C. D. A. The correct solution is 3 28 because 3 4 12 112 3. 8   x 16 7 10. Which percent is closest to the ratio 7:3? A. 23% B. 43% C. 73% D. 233% D. To convert a ratio to a percent, divide the numbers in the ratio (noting that its equivalent fraction is 7 3) to get approximately 2.33. Then, multiple by 100% to get 233%.

  5. 11. The data below shows the number of minutes available to eat breakfast for a group of employees. 10, 20,40, 30, 50, 60, 50, 40, 30, 20, 40, 30, 10, 20, 30, 50, 40, 10, 10, 20, 30, 40, 20, 50, 40, 30. Select a dot plot for the data. A. The correct solution is A. There are 4 employees who have 10 minutes and 50 minutes, 5 employees who have 20 minutes, 6 employees who have 30 minutes and 40 minutes, and 1 employee who has 60 minutes. 12. If 15 out of every 250 contest entries are winners, what percentage of entries are winners? A. 0.06% B. 6% C. 15% D. 17% B. First convert the fraction 15 250to a decimal: 0.06. To get the percent, multiply by 100% (that is multiply by 100 and add the % symbol.

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