The length of a living room is 12 feet and its width is 10 1/2 feet. The length of the room is being expanded by x feet. Select
all the expressions that represent the area of the living room in square feet. Answer Choices:
A. 10.5(12x) square feet
B. (10.5 + 12 + x) square feet
C. 10.5(12 + x) square feet
D. 126x square feet
E. (126 + 10.5x) square feet
F. (22.5 + x) square feet
You see, the answer is C. When you are calculating the area of a rectangle, you have to multiply length times width. That eliminates any possible answer of B., E., or F. Now we have A., C., and D. left. The answer is not A because we have to add the unknown expansion to the length (12), not multiply it. This reasoning also eliminates D from our set of answer choices which leaves us with C as our one and only answer.
To find this you simply have to look at the formula given. n stands for the number of days. 300,000 is the original. So the only number left is 1.008, but you have to make this a percent by moving the decimal to the right 2 places. Final answer is 100.8%
