Use a coterminal angle to find the exact value of the expression. Do not use a calculator.tan 390°
A. -
B. 
C. 
D. 
Answer: C
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Use polar coordinates to find the limit of the function as (x, y) approaches (0, 0).f(x, y) = 
A. 1 B. ? C. 0 D. -1
Solve the inequality. Describe the solution set with interval notation.-42x - 42 ? -6(6x + 11)
A. (-?, 4) B. (4, ?) C. (-?, 4] D. [4, ?)
Solve the problem.A rectangular box with volume 371 cubic feet is built with a square base and top. The cost is $1.50 per square foot for the top and the bottom and $2.00 per square foot for the sides. Let x represent the length of a side of the base. Express the cost of the box as a function of x. Give the function and state its domain.
A. C(x) = 2x2 + 
Domain: {x| x < 10}
B. C(x) = 3x2 + 
Domain: {x| x > 0}
C. C(x) = 4x + 
Domain: {x| x > 0}
D. C(x) = 3x2 + 
Domain: {x| x > 4}
Find the missing dividend or divisor. 
= 6x6 - 10x4 + x
A. 6x7 + 10x5 + x2 B. 6x7 - 10x5 + x C. 6x7 - 10x5 + x2 D. 6x7 - 10x5 - x2