Use the power-reducing identities to rewrite the expression that does not contain trigonometric functions of power greater than 1.cos4 x
A. 
B. 
C. 
D. 
Answer: C
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Solve the equation.3x = 
A. {3}
B. 
C. {-3}
D. 
Determine whether the pair of fractions is equivalent.
and 
A. not equivalent B. equivalent
Find the product.(4y2 - y + 2)(-3y3 - 6y + 3)
A. -12y5 - 3y4 - 30y3 + 18y2 - 15y - 6 B. 12y6 + 3y4 + 30y3 + 18y2 - 15y + 6 C. -12y5 + 3y4 - 30y3 + 18y2 - 15y + 6 D. -12y5 + 6y2 + 6
Solve the problem.Suppose that the weather in a certain city is either sunny, cloudy, or rainy on a given day, and consider the following:1) If it is sunny today there is a 70% chance it will be sunny tomorrow and a 30% chance that it will be cloudy.2) If it is cloudy today there is a 40% chance it will be sunny tomorrow, a 40% chance that it will be cloudy, and a 20% chance that it will be rainy.3) If it is rainy today there is a 40% chance it will be sunny tomorrow, a 30% chance that it will be cloudy, and a 30% chance that it will be rainy.In the long run, how likely is it that the weather will be rainy on a given day?
A. 11.3% B. 12.1% C. 10.6% D. 9.5%