Solve the problem.A contractor mixes concrete from bags of pre-mix for small jobs. How many bags with 8% cement should he mix with 24 bags of 12% cement to produce a mix containing 10% cement?
A. 36 bags
B. 12 bags
C. 48 bags
D. 24 bags
Answer: D
Mathematics
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Calculate the area of the surface S.S is the portion of the paraboloid z = 2x2 + 2y2 that lies between z = 3 and z = 4.
A. 
B. 
C. 
D. 
Mathematics
Solve the problem.Six college buddies bought each other Christmas gifts. They spent $270.98, $273.51, $229.29, $282.02, $212.55, and $169.14. Find the mean amount spent for Christmas gifts.
A. $287.50 B. $239.58 C. $275.50 D. $359.37
Mathematics
Write the standard form of the equation of the circle.Center (5, 3), r = 9
A. (x + 5)2 + (y + 3)2 = 9 B. (x - 5)2 + (y - 3)2 = 81 C. (x - 5)2 + (y - 3)2 = 9 D. (x + 5)2 + (y + 3)2 = 81
Mathematics
Answer the question.True or False: The graph of the equation x = 10 is a vertical line.
A. False B. True
Mathematics