Add.
A. 90
B. 70
C. 82
D. 80
Answer: D
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Find the volume of the solid generated by revolving the region about the given line.The region in the first quadrant bounded above by the line 2x + y = 4, below by the x-axis, and on the left by the y-axis, about the line x = -2
A. 
?
B. 
?
C. 
?
D. 
?
Subtract.
- 
A. 
B. 1
C. - 
D. 1
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. 
= 
Use the dot product to determine whether the vectors are parallel, orthogonal, or neither.v = 4i - j, w = 8i - 2j
A. orthogonal B. parallel C. neither