Simplify the expression. Assume that all variables represent positive real numbers.(-216)-2/3
A. - 
B. -36
C. 36
D. 
Answer: D
Mathematics
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Express the number as the ratio of two integers.0.77777 . . .
A. 
B. 
C. 
D. 
Mathematics
Parametric equations and a value for the parameter t are given. Find the coordinates of the point on the plane curve described by the parametric equations corresponding to the given value of t.x = 2 + 3 cos t, y = 4 + 2 sin t; t = 
A. (5, 4)
B. 
C. (2, 5)
D. (2, 6)
Mathematics
Perform the desired operation. Write the answer in the form a + bi.(-2 + i)(-2 - i)
A. 5 B. 4 C. -3 D. -2
Mathematics
Solve the problem.The profit that the vendor makes per day by selling x pretzels is given by the function 
Find the number of pretzels that must be sold to maximize profit.
A. 170 pretzels B. 0.8 pretzels C. 800 pretzels D. 400 pretzels
Mathematics