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A person weighed themselves at 190 lb. Three months later they weighed themselves at 180 lb. Which of the following is the percent of weight the person lost over 3 months? (Round to the nearest percent.)

A. 8%

B. 9%

C. 11%

D. 5%

Answer Explanation:

Explanation: The percentage change in weight is found in three steps below:
Absolute change in weight = final weight - initial weight

Absolute change in weight = (|180 - 190| = |-10| = 10)

Relative change in weight = (frac{absolute change}{initial weight} = frac{10}{190} = 0.0526)

Percent change = relative change * 100%

Percent change = 0.0526 * 100% = 5.26%

The percent change in weight lost is 5.26%, which is about 5%.

Therefore, the Correct Answer is D.

Q #1: Ann’s mother is twelve less than 2 times Ann’s age. Which of the equations represents Ann’s mother’s age (p) as it relates to Joe’s age (q)?

A. p=12-2q

B. q=2p-12

C. p=2q-12

D. q=12-2p

Answer Explanation
Q #2: A teacher has marked all math final exam for first years. He needs to track the performance of his subject. Which of the following is the best way to display the frequency for test scores of the final exams?

A. Histogram

B. Pie graph

C. Scatter plot

D. Bar graph

Answer Explanation
Q #3: A circle has an area of 36\pi in2. Which of the following is the circumference of the circle in terms of pi ( \pi)?

A. 3 \pi in

B. 6 \pi in

C. 12 \pi in

D. 24 \pi in

Answer Explanation

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