Factor by grouping. Assume any variable exponents represent whole numbers.2a2x + 8a2y + 7bx + 28by
A. (x + 4y)(2a2 + 7b)
B. (x - 4y)(2a2 + 7b)
C. (x + 4y)(2a2 + 7)
D. (x + 4y)(2a + 7b)
Answer: A
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Solve the problem.Integrate 
over the region 0 ? x2 + y2 ? 100.
A. ?(1 - cos2 10) B. 2?(1 - cos 100) C. ?(1 - cos 100) D. 2?(1 - cos2 10)
Solve the equation.41(x - 164) = 82
A. 164 B. 82 C. 166 D. 162
Solve the problem.A railroad bridge is built over a V-shaped canyon. If the supports are 3 feet long at each end, the center support is 253 feet long, and the supports increase in length by 2 feet with each support (from 3 feet to 253 feet), what is the total length of all the supports?
A. 32,003 feet B. 32,001 feet C. 32,005 feet D. 32,000 feet
Translate to an equation and solve. When necessary, round to the nearest hundredth.32% of 1700 is what?
A. 54.4 B. 5440 C. 544 D. 54,400