Check the given subtraction. If the answer is incorrect, give the correct answer.
64
A. Incorrect; should be 53
B. Incorrect; should be 62
C. Correct
D. Incorrect; should be 63
Answer: D
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Provide an appropriate response.Suppose that you want to construct a graph to represent the following data. 
If you are primarily interested in the number of people in each category as a percentage of the total number of people, would a bar chart or a pie chart be more useful? Explain your thinking.
What will be an ideal response?
Solve the problem.Snell's Law states that
= 
,where v1, v2are the speeds at which light travels through two different mediums, and ?1, ?2 are the angles of incidence and refraction respectively. Find the angle of refraction if 
and the angle of incidence is 26°. Give your answer in degrees to the nearest hundredth.
A. 7.87° B. 44.54° C. 5.24° D. 15.90°
Solve the problem.The sum of two numbers is 44 and their difference is 14. Find the numbers.
A. 31 and 13 B. 31 and 45 C. 13 and 31 D. 15 and 29
Multiply. Write the answer as a mixed number as needed.7
× 
A. 7
B. 6
C. 4
D. 4