Solve the problem.Three different high schools plan to order the same three text books. School A plans to order 90 of book 1, 20 of book 2, 80 of book 3. School B plans to order 60 of book 1, 20 of book 2, 20 of book 3. School C plans to order 80 of book 1, 100 of book 2, 70 of book 3. The cost of book 1 is $15 per copy, the cost of book 2 is $20 per copy, and the cost of book 3 is $25 per copy. What matrix product displays the cost to each school of buying the textbooks? Display the two matrices which must be multiplied and their product.
A. 
= 
B. 
= 
C. 
= 
D. 
= 
Answer: A
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Find the derivative of the function.
?
?
A. 
B. 
C. 
D. 
Solve the problem. Round answers to the nearest dollar.Three partners contributed $24,000, $46,000, and $147,000, respectively, to start a company. Find the share that each partner gets if profits are $106,000 and the profits are divided by the ratio of investment.
A. $25,440 to 1 $48,760 to 2 $155,820 to 3 B. $12,000 to 1 $23,000 to 2 $73,500 to 3 C. $11,724 to 1 $22,470 to 2 $71,806 to 3 D. $35,333 each
Find an equation of an ellipse satisfying the given conditions.Vertices: (-1, -4) and (9, -4); endpoints of minor axis: (4, -8) and (4, 0)
A. 
+ 
= 1
B. 
+ 
= 1
C. 
+ 
= 0
D. 
+ 
= 1
Evaluate the series, if it converges.
A. 
B. 12
C. 30
D. Does not converge.