Factor the polynomial completely.x2 - 40x + 400
A. (x + 20)2
B. (x - 20)2
C. (x + 20)(x - 20)
D. Prime
Answer: B
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Solve the problem.An order of award presentations has been devised for seven people: Jeff, Karen, Lyle, Maria, Norm, Olivia, and Paul. In how many ways can the first award be presented to Karen and the last to Lyle?
A. 120 B. 24 C. 360 D. 840
Find the exact value of y, or state that y is undefined.y = tan-1 
A. - 
B. 
C. 
D. 
Solve. Express the result in scientific notation. Round to the nearest hundredth, if necessary.A particle is observed moving at 3.59 × 104 meters per second. Find the distance the particle would travel in 
seconds.
A. 9.51 × 10-2 meters B. 0.95 × 10-3 meters C. 9.51 × 10-4 meters D. 9.51 × 10-3 meters
Perform the indicated operation.(2.4x3 - 7.7x2 - 2) - (8.1x3 - 2.7x2 + 2)
A. -5.7x3 - 10.4x2 - 4 B. -5.7x3 - 5x2 - 4 C. 10.5x3 - 5x2 - 4 D. -5.7x3 - 5x2 + 4