Let a and b be positive numbers. Determine whether the statement is true or false.(-a)(-a) is a positive number.
A. True
B. False
Answer: A
Mathematics
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Use the four-step process to find the slope of the tangent line to the graph of the given function at any point.
?
?
?
A. -7x B. 7 C. 7x D. 0
Mathematics
Solve the problem.The finite sequence whose general term is an = 0.11n2 - 1.06n + 7.29where n = 1, 2, 3, ..., 9 models the total operating costs, in millions of dollars, for a company from 1991 through 1999.Find 
A. $26.6 million B. $31.7 million C. $25.36 million D. $21.86 million
Mathematics
Subtract.-13 - (-12)
A. 1 B. -25 C. -1 D. 25
Mathematics
Simplify the expression by removing as many factors as possible from under the radical. Assume that all variables represent positive real numbers.
? 
A. 12
B. 
C. 6
D. 36
Mathematics