Solve. Provide answers in interval notation.
? 0
A. (-7, 8]
B. [-7, 8]
C. [-8, 7]
D. (-8, 7]
Answer: D
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Solve the problem.The strength S of a rectangular wooden beam is proportional to its width times the square of its depth. Find the dimensions of the strongest beam that can be cut from a 
cylindrical log. (Round answers to the nearest tenth.)
A. w = 6.8 in.; d = 9.2 in. B. w = 4.8 in.; d = 9.2 in. C. w = 5.8 in.; d = 8.2 in. D. w = 6.8 in.; d = 7.2 in.
Use a graphing calculator to determine which expression completes the identity.The expression 
+ cot ?is to be the left hand side of an equation that is an identity. Which one of the following four expressions can be used as the right hand side of the equation to complete the identity?
A. sec ? B. cos ? C. csc ? D. tan ?
Solve the exponential equation. Express the solution set in terms of natural logarithms.3 9x = 4.5
A. 
B. 
C. 
D. 
Solve.log2 x = -3
A. 
B. -1
C. -6
D. 