Solve.It takes 10 hours for 6 people to paint a house. How long will it take 2 people to do the job?
A. 28.5 hr
B. 3.2 hr
C. 3.3 hr
D. 30 hr
Answer: D
Mathematics
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Find the limit.
A. 
B. 1
C. -2
D. 2
Mathematics
Express the number in scientific notation.0.0000004
A. 4 × 10-6 B. 4 × 10-8 C. 4 × 10-7 D. 4 × 10-9
Mathematics
Find the mode or modes for the set of numbers.5, 9, 21, 3, 2, 8, 29, 1, 4, 16
A. 9 B. No mode C. 9.2 D. 8
Mathematics
Use Cramer's rule to solve the linear system. If D = 0, use another method to determine the solution set.2x + 2y + z = 152x - 3y - z = 43x + y + 4z = 28
A. {(3, 1, 5)} B. Cramer's rule does not apply since D = 0; ? C. {(5, 1, 3)} D. {(5, 3, 1)}
Mathematics