Exam 4: Percents and Problem Solving

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About 58 baby boys are born for every 50 baby girls. Write this as the simplified ratio of females to males.

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In 1988 90% of adult Americans considered themselves happy people. Assuming the same facts apply today and assuming that there are 235 million adult Americans, how many adult Americans consider themselves happy people? __________ adult Americans

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Write the number 0.60.6 as a percent.

(Multiple Choice)
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Change the decimal to a percent. 0.0650.065 __________ %

(Short Answer)
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If you drive 273273 miles on 191219 \frac { 1 } { 2 } gallons of gas, what is the simplified ratio of miles to gallons?

(Multiple Choice)
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Grades in a classroom are often given according to the percentage score obtained by the student. Suppose that a teacher grades according to the following scheme, where all scores are rounded to the nearest percent: A 90%−100%\quad 90 \% - 100 \% B 80%−89%80 \% - 89 \% C 65%−79%65 \% - 79 \% D 50%−64%50 \% - 64 \% F0%−49%\mathrm { F } \quad 0 \% - 49 \% To determine a percent grade, form a ratio of score received to possible score and then write this ratio as a percent. Calculate the percent (nearest percent) and determine the letter grade for each score. The student gets 56 answers right out of a possible 100. What is the percent score? __________% What is the letter grade? __________

(Short Answer)
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Write a proportion for the statement, and then solve the proportion to find the value of the variable. 33 is to 2424 as 22 is to uu

(Multiple Choice)
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Estimate the percentage. 10% of 96.1

(Multiple Choice)
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What is the gear ratio (rear to front) of a bicycle that has 26 teeth on the rear sprocket and 46 teeth on the front sprocket?

(Short Answer)
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Read the proportion and name the means and extremes. 8010=81\frac { 80 } { 10 } = \frac { 8 } { 1 } The means are -------  and \text { and } -------- . The extremes are -------  and \text { and } ------ .

(Short Answer)
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Change the fraction to a percent. Give the answer to the nearest whole percent. 2829\frac { 28 } { 29 } __________%

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Solve the proportion. Give your answer as a fraction in lowest terms. 1x=74\frac { 1 } { x } = \frac { 7 } { 4 }

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Write a proportion for the statement, and then solve the proportion to find the value of the variable. xx is to 99 as 11 is to 33 ??=??\frac { ? } { ? } = \frac { ? } { ? } x=x = __________

(Short Answer)
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Write the percent as a simplified fraction. In 1973 unemployment in a certain city had spiraled to 11 thousand, making the unemployment figure jump by 350%.

(Short Answer)
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Write a proportion for the statement, and then solve the proportion to find the value of the variable. 99 is to 2424 as 66 is to tt ??=??\frac { ? } { ? } = \frac { ? } { ? } t=t = __________

(Short Answer)
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Find the missing term in the proportion. 79=7x\frac { 7 } { 9 } = \frac { 7 } { x }

(Multiple Choice)
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Write a proportion for the statement, and then solve the proportion to find the value of the variable. 11 is to 88 as xx is to 2424

(Multiple Choice)
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A family plans to drive their car during their annual vacation. The car can go 350 miles on a tank of gas, which is 18 gallons of gas. The vacation they have planned will cover 1,820 miles. How many gallons of gas will that take? Round your answer to one decimal place, if necessary. __________ gal

(Short Answer)
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Change the given form into the two missing forms. Change the given form into the two missing forms.

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Change the percent to a fraction in lowest terms. 43%

(Short Answer)
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