Translate to an equation and solve.21 is what percent of 25?
A. 84%
B. 8.4%
C. 0.84%
D. 8400%
Answer: A
Mathematics
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If possible, evaluate the expression by hand. If not, approximate the answer to the nearest hundredth.
-1/2
A. 
B. 
C. 
D. Not a real number
Mathematics
Find the sum.2, 4, 8, 16, 32
A. 64 B. 62 C. 60 D. 72
Mathematics
Simplify the expression. Assume that all variables represent nonnegative numbers.
- 7
- 2
A. -51
B. -9
C. -51
D. -9
Mathematics
Solve the problem.Two trains leave a train station at the same time. One travels east at 7 miles per hour. The other train travels west at 11 miles per hour. In how many hours will the two trains be 144 miles apart?
A. 16 hr B. 8 hr C. 4 hr D. 8.5 hr
Mathematics