Solve the problem.Cory and Melissa are racing electronic cars around a circular track. They begin at the same time going in the same direction. Cory's car completes a revolution in 55 seconds, while Melissa's car completes a revolution in 50 seconds. How long will it take them before both cars reach the starting point again simultaneously?
A. 220 sec
B. 1100 sec
C. 550 sec
D. 110 sec
Answer: C
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Evaluate the integral.
A. 
B. 
C. 
D. 
Write the factor set of the number.99
A. {1, 3, 9, 11, 33} B. {1, 3, 9, 11, 33, 99} C. {1, 3, 9, 11, 99} D. {1, 3, 9, 11, 18, 33, 99}
Provide an appropriate response.Y represents a positive whole number. Tell which of the quantities below is smallest and which is largest.A: Y ? 
B: Y ? 
C: Y ÷ 
D: Y ÷ 
A. Smallest: A; largest: D B. Smallest: D; largest: B C. Smallest: D; largest: A D. Smallest: B; largest: D
Solve the problem.A 12-ft. board is cut into 2 pieces so that one piece is 4 feet longer than 3 times the shorter piece. If the shorter piece is x feet long, find the lengths of both pieces.
A. shorter piece: 2 ft.; longer piece: 10 ft. B. shorter piece: 6 ft; longer piece: 36 ft. C. shorter piece: 12 ft; longer piece: 40 ft. D. shorter piece: 32 ft; longer piece: 36 ft.