Perform the indicated operation.18.9 - 1.05
A. 20.95
B. 17.95
C. 17.85
D. 19.95
Answer: C
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Solve the problem.The stiffness of a rectangular beam is proportional to its width times the cube of its depth. Find the dimensions of the stiffest beam than can be cut from a 
cylindrical log. (Round answers to the nearest tenth.)
A. w = 7.0 in.; d = 11.4 in. B. w = 5.0 in.; d = 11.4 in. C. w = 6.0 in.; d = 10.4 in. D. w = 7.0 in.; d = 9.4 in.
Find the area or volume.Find the volume of the solid generated by revolving the region in the first quadrant under the curve 
bounded on the left by x = 1, about the x-axis.
A. 8?
B. 
?
C. 64?
D. 
?
Solve the problem.Two cars start from the same point and travel in the same direction. If one car is traveling 62 miles per hour and the other car is traveling at 56 miles per hour, how far apart will they be after 2.3 hours?
A. 128.8 mi B. 13.8 mi C. 271.4 mi D. 142.6 mi
Solve.6r + 10 = 52
A. 40 B. 36 C. 7 D. 1