Provide an appropriate response.The revenue (in thousands of dollars) from producing x units of an item is modeled by
Find the marginal revenue at x = 1000.
A. $10,300.00
B. $4.50
C. $4.00
D. $104.00
Answer: C
Mathematics
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Evaluate the determinant.
A. 66 B. -42 C. 51 D. -66
Mathematics
Solve the problem.When you buy an item on which sales tax is charged, the total cost is calculated by the formula: 
where T is the total cost, P is the item's price, and S is the sales tax rate (as a percent). If you pay $14.77 for an item priced at $14, what was the tax rate?
A. 6.5% B. 5.5% C. 2.75% D. 7.5%
Mathematics
Find the limit.
ey2 sin-1
A. 
B. 0
C. 1
D. ?
Mathematics
Graph the parabola.x2 = -20y 
A. 
B. 
C. 
D. 
Mathematics