Solve the problem.Find the acute angle ? (in degrees) that satisfies the equation ? = cos-1 
.
A. 30°
B. 45°
C. 330°
D. 315°
Answer: B
Mathematics
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Find the indicated probability. Round your answer to 6 decimal places when necessary.A bag contains 5 red marbles, 4 blue marbles, and 1 green marble. What is the probability of choosing a marble that is not blue?
A. 
B. 6
C. 
D. 
Mathematics
Evaluate the integral.
A. 
?
B. 
?
C. 
?
D. 
?
Mathematics
Provide an appropriate response.Find angle A. Round to the nearest 0.1°. 
A. 55.4° B. 61.2° C. 124.6° D. 34.6°
Mathematics
Write the number as the product of a real number and i.- 
A. 4i
B. 4
C. -4i
D. i
Mathematics