Find the exact value of the expression if ? = 30°. Do not use a calculator.f(?) = cos ?Find 5f(?).
A. - 
B. - 
C. 
D. 
Answer: C
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Find the logarithm using the change-of-base formula. Round to the nearest ten-thousandth.log5 22.93
A. 1.9463 B. 1.3604 C. 4.5860 D. 0.5138
Solve the problem.The equation 
represents the total daily profit of 
TV sales. The variable y represents the total profit, in tens of dollars, of selling x 
TVs. How many 
TVs must be sold to achieve maximum daily profit? What is the maximum profit?
What will be an ideal response?
Solve the system. If the system has infinitely many solutions, write the solution set with x arbitrary.3x + 2y + z = 42x - 3y - z = 55x + 12y + 5z = 2
A. {(x, -5x - 9, -13x + 22)} B. {(x, -5x + 9, -13x + 22)} C. {(x, 5x + 9, -13x + 22)} D. {(x, 5x - 9, -13x + 22)}
For the measured quantity, state the set of numbers that is most appropriate to describe it. Choose from the natural numbers, integers, or rational numbers.The number of cars sold in an average month at Bob's Auto Sales
A. Integers B. Rational numbers C. Natural numbers