Perform the indicated operations. Express the answer as a single polynomial in standard form.9x7(-12x + 2)
A. -90x7
B. -108x + 18
C. -108x8 + 18x7
D. -108x8 + 2
Answer: C
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Let B denote the price of a bag of groceries at time t. It is found that 
changes sign from positive to negative at 
. What can be concluded about the graph of B at the point
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?
A. The graph of B reaches a maximum at .
B. The graph of B reaches a minimum at .
C. The graph of B is increasing at .
D. The graph of B is decreasing at .
Change the order of integration and evaluate the integral.
A. 
?
B. 
?
C. 69,984?
D. 
?
Find the approximate value of the expression, rounded to four decimal places.cos 38°50'
A. 0.8050 B. 0.6271 C. 0.2964 D. 0.7790
Subtract using columns.Subtract (6x9 - 2x5 + 7x2 - 8) from (3x9 + 5x7 - 8x2 + 13) .
A. -3x9 + 5x7 - 2x5 - 15x2 + 21 B. 3x9 + 5x7 - 2x5 - 15x2 + 21 C. -3x9 + 5x7 + 2x5 - 15x2 + 21 D. 3x9 + 5x7 + 2x5 - 15x2 + 21