Find the area of the surface generated by revolving the curves about the indicated axis.x = sin t, y = 5 + cos t, 0 ? t ? 2?; x-axis
A. 30?2
B. 5?2
C. 15?2
D. 20?2
Answer: D
Mathematics
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Decide whether the statement is true or false. If it is false, tell why.If k is a prime number, then x2 = k will have two rational solutions.
A. True B. False; the solutions will be irrational because a prime number cannot be a perfect square. C. False; the equation will have no real number solutions.
Mathematics
Solve. Remember to insert units when writing your answer.In November, 10 tons 1037 lb of coal were delivered to a steel mill. In December, 6 tons 1715 lb were delivered. Find the total amount of coal delivered in these two months.
A. 16 tons 752 lb B. 17 tons 752 lb C. 3 tons 1322 lb D. 4 tons 1322 lb
Mathematics
Evaluate.
A. 21 B. 7 C. 1 D. 0!
Mathematics
Find A-1 without a calculator.A = 
A. A-1 = 
B. A-1 = 
C. A-1 = 
Mathematics