A person weighed themselves at 160 lb. Three months later they weighed themselves at 130 lb. Which of the following is the percent of weight the person lost over 3 months? (Round to the nearest percent.)
20%
13%
19%
29%
Correct Answer : C
the percentage change in weight is found by calculating change in weight over original multiplied by 100%.
First, find the change in weight over the 3 months
Change in weight lost= 1860-130=30 lb
Thus
The percent change in weight is 19% to the nearest whole number.
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Correct Answer is D
Explanation
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Convert the mixed fraction into proper fraction as follows
If we let x be the number of gallons in full tank, and setting up the proportion equation with the number of gallons on the numerator and fraction of tank on denominator as follows.
Cross-multiply to find the value of x.
Converting 189/10 to a mixed fraction is 18 9/10. Thus, when the tank is full, it holds 18 9/10 gallons of water.
Correct Answer is A
Explanation
To find the minimum length requires, we need to understand what slope in the question represents. The slope represents the ratio between the height to the length. Let x be the minimum length of the ramp. Then,
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Correct Answer is B
Explanation
To determine the number of sophomore students, follow these steps:
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1,276
- Identify the percentage of sophomores:
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- Calculate the number of sophomores:
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- Round to the nearest whole number:
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Explanation
To find the amount of vanilla in mL, we set up an equation in a way the unwanted units cancel out and leave the wanted unit we are looking for. Then,
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Correct Answer is A
Explanation
We follow the order of operations to solve the given expression.
First, we start with the numerator and solve it as follows
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[3(2+24)]
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[3(26)]=3*26=78
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The expression reduces into 6.
Correct Answer is D
Explanation
the mean of a data set is the total scores divided by the number of tests.
Total test scores =80+68+74+87+96=405
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Explanation
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Explanation
The circumference of a circle is given by the formula:
C=πd
where:
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Explanation
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Correct Answer is D
Explanation
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- Apply rounding rules:
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- Since 7 is in the hundredths place, round 24.3 up to 24.4.
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