Factor by grouping.6x3 - 10x2y + 15xy2 - 25y3
A. (3x + 5y)(2x2 - 5y2)
B. (3x - 5y2)(2x2 + 5y)
C. (3x - 5y)(2x2 + 5y2)
D. (6x + 5y)(x2 - 5y2)
Answer: C
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Find the potential function f for the field F.F = (ey2 - sin x)i + 2xyey2j + k
A. f(x, y, z) = cos x + xey2 + z + C B. f(x, y, z) = cos x + ey2 + z + C C. f(x, y, z) = cos x + xzey2 + C D. f(x, y, z) = cos x + ey2(x + z) + C
Use the formula s = r?t to find the value of the missing variable. Give an exact answer.r = 2 cm, ? = 
radian per sec, t = 16 sec
A. 
cm
B. 
cm
C. 
cm
D. 
cm
Give the amplitude or period as requested.Period of y = 2 cos x
A. 2
B. ?
C. 
D. 2?
Solve the problem.Coyotes are one of the few species of North American animals with an expanding range. The future population P of coyotes in a region of Mississippi can be modeled by the equation 
, where t is time in years. How long will it take for the population to reach 140? Round your answer to the nearest tenth, if necessary.
A. 8.2 years B. 8.4 years C. 8.3 years D. 5517 years