,31 out of 38 stu- S, in section B, 47 out of 56 students it Clas n section C, 3
ID: 3146644 • Letter: #
Question
,31 out of 38 stu- S, in section B, 47 out of 56 students it Clas n section C, 34 out of 45 students passed assed the class; i the class; and in section D, 45 out of 52 students passed the class. Compare the passing rates in each section and rank them from best to worst. 7. A 250-piece puzzle is missing 14% of its pieces from its box. How many pieces are in the box? 8. Jefferson Elementary School has 750 students. The Friday before spring break 22% of the student body was absent. How many students were in school that day? 9. At the Happyville Mall, you buy a pair of earrings that are marked $6.95. After sales tax, the bill was $7.61. What is the tax rate in Happyville (to the nearest tenth of a percent)? 10. Arvin's tuition bill for last semester was $5760. If he paid $6048 in tuition this semester, what was the percentage in- crease on his tuition? The inflation rate in 2011 was 3.16%. (Source: Bureau of Labor Statistics.) Use this rate to find what salary at the end of 2010 would be equivalent to a $50,000 salary at the end of 2011.Explanation / Answer
7.
14% of 250 = 14%*250 = 35
35 pieces are missing.
Pieces left in box = 250 - 35 = 215
8.
22% 750 = 22%*750 = 165
165 students are absent.
students present in school are 750 - 165 = 585
9.
Tax rate = (7.61 - 6.95)/6.95 * 100 = 0.095 * 100 = 9.5%
10.
% increase = (6048 - 5760)/5760 * 100 = 5%
11.
Inflation increase = 50000 * 3.16% = 1580
Salary = 50000 + 1580 = 51580
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