Perform the indicated operations. Simplify the answer.
A. -5
B. 5i
C. 5
D. -5i
Answer: C
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Simplify. Assume all variables represent nonnegative values.
A. 
B. 1
C. 14
D. 
Suppose ABC is a right triangle with sides of lengths a, b, and c and right angle at C. Find the unknown side length using the Pythagorean theorem and then find the value of the indicated trigonometric function of the given angle. Rationalize the denominator if applicable.Find tan B when a = 48 and c = 50.
A. 
B. 
C. 
D. 
Solve the problem.Bob owns a watch repair shop. He has found that the cost of operating his shop is given by 
where x is the number of watches repaired. How many watches must he repair to have the lowest cost?
A. 20 watches B. 31 watches C. 63 watches D. 39 watches
Perform each operation in proper order.82 × 113 + (8 - 4) × 3
A. 85,196 B. 85,220 C. 7756 D. 540