Write the percent problem as a proportion and solve.What percent of 1600 is 100?
A. 16.5%
B. 6.25%
C. 1.25%
D. 16.75%
Answer: B
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Find the center of mass of a thin plate covering the given region with the given density function.The region bounded by the parabola y = 81 - x2 and the x-axis, with density ?(x) = 9x2
A. 
= 
, 
= 0
B. 
= 0, 
= 
C. 
= 0, 
= 
D. 
= 0, 
= 
Factor out the GCF from the polynomial.20p + 10q - 10
A. 10(2p + q - 1) B. 10p(2 + q - 1) C. 10(2p + q) D. no common factors
Provide an appropriate response.X divided by Y is represented by:
A. X/Y B. X + Y C. X:Y D. XY
A survey showed that students had these preferences for instructional materials. Use the graph to answer the question.
About how many students would you expect to prefer written materials in a school of 450 students?
A. About 162 students B. About 41 students C. About 9 students D. About 81 students