What is the area of a square that measures 3.1m on each side?

A. 12.4m2

B. 9.61m2

C. 6.2m2

D. 9.1m2

Answer Explanation:

Here we are required to find the area of the square of sides 3.1 m. The square is a four-sided figure with each side equal and opposite sides making 90 degrees.

Area of the square =side*side

Side=3.1 m

Area of the square=3.1 m *3.1 m=9.61 m2

Note: 3.1 + 3.1 = 6.2 which is a wrong answer.

Therefore, the Correct Answer is B.

Q #1: A survey of 500 teenagers was taken to see which sport was the favorite to watch on television. The pie chart above represents the results. Which of the following data sets (number of teenagers) was used to develop the pie chart?

A. Basketball, 120: football, 190: hockey, 90: soccer, 80: other 20

B. Basketball, 120: football, 190: hockey, 80: soccer, 90: other 20

C. Basketball, 190: football, 120: hockey, 90: soccer, 80: other 20

D. Basketball, 240: football, 380: hockey 160: soccer, 180: other 40

Answer Explanation

The whole pie chart represents 100%, which we use together with the given percentages to find the respective different sports. Note that 100% is equal to 500 surveyed students. The, the number of teenagers who prefer:

Soccer

Hockey

Football

Basketball

Other

From the evaluations above, 90 teenagers love soccer, 80 love hockey, 190 teenagers love football, 120 teenagers love basketball, and 20 teenagers love others.
Q #2: An employee discovers that 0.0025 of all products produced at a factory contain defects. Which of the following percentage does this represent?

A. 0.25%

B. 25%

C. 2.5%

D. 0.025%

Answer Explanation

all products represent 100%. Then, the portion of defect products is:

0.0025 of 100%

‘of’ means multiply

0.0025 *100%=0.25%
Q #3: A local law school reports that 74% of last year's graduates are employed by law firms, 3% work for the government and 2% work for nonprofit organizations. The rest of the graduates work at jobs unrelated to law. Based on these outcomes, which of the following is the percentage of graduates working jobs unrelated to law?

A. 5%

B. 79%

C. 69%

D. 21%

Answer Explanation

Percentages always add up to 100%. If we let x be the percent of graduates working for jobs unrelated to law, then

74%+3%+2%+x=100%

79%+x=100%

Subtract 79% from both sides of the equation

79%-79%+x=100%

x=100%-79%

x=21%

So, the number of graduates working for jobs unrelated to law is 21%.