Answer the question about percent. Round to the nearest whole number where necessary.143 is 45% of what number?
A. 3
B. 318
C. 3180
D. 31,800
Answer: B
Mathematics
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Find the area of the region specified in polar coordinates.the region inside 
and outside 
A. 25
B. 25
C. 25
D. 25
Mathematics
Perform the indicated operation and simplify.
- 
A. 
B. 
C. 
D. 
Mathematics
Simplify the expression.-|-20|
A. -20 B. 20 C. -1 D. 1
Mathematics
Solve the problem.A choreographer of a musical wants to hire enough dancers so that he can arrange them in groups of exactly 9, 12, and 18 with no dancers left out. What is the least number of dancers he can hire?
A. 216 B. 36 C. 72 D. 18
Mathematics