Kelly and Jody packed boxes with books. If Jody packed 60% of the total number of boxes, what was the ratio of the number of boxes Kelly packed to the number that Jody packed?

A. 1 to 6
B. 1 to 4
C. 2 to 5
D. 3 to 5
E. 2 to 3

Explanation:

If Jody packed 60% of the boxes then Kelly packed 40%. The ratio of the number of boxes Kelly packed to the number Jody packed is thus 40%/60%=2/3

The temperatures in degrees Celsius recorded at a certain specific point in the evening in various parts of a country were 10°, 5°, -2°, -1°, -5°, 15°. What is the median of these temperatures?

A. -2°C
B. -1°C
C. 2°C
D. 3°C
E. 5°C

Explanation:

To get the median first we need to sort the temperatures in ascending order:

-5°, -2°, -1°, 5°, 10°, 15°

When the number of values in a list is even, the median is the average of the middle two values in the list in this case -1 and 5, i.e. 2.

y=248-398x Which of the following values of x gives the greatest value of y in the equation above?

A. 200
B. 100
C. 0.5
D. 0
E. -1

Explanation:

This is quite simple. Just by looking at the values they are all positive except two. If you enter any of the values instead of x you will get a negative y. By entering 0 you already get to positive=248. But the correct answer is -1 since this equals y=248-(398*(-1))=248+398. This is the greatest value.

The ratio of length to width of a rectangular showroom window is 3.3 to 2. If the width of the window is 8 feet, what is the approximate length of the display in feet?

A. 7
B. 11
C. 13
D. 16
E. 26

Explanation:

Letting L be the length of the window, the proportion for the ratio of the length to the width can be expressed in the following equation:

3.3/2=L/8

26.4=2L

13.2=L

A certain country had a total annual expenditure of \$1.2x10^12. If the population of the country was 240 million last year, what was the per capita expenditure?

A. \$500
B. \$1000
C. \$2000
D. \$3000
E. \$5000

Explanation:

In scientific notation 240 million is 2.4x10^8. So the per capita expenditure was:

(\$1.2x10^12)/(2.4x10^8)=(\$1.2)/(2.4)x10^12-8=\$0.5x10^4=\$5000

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