Solve the problem.The chart represents the amount of fuel consumed by a machine used in manufacturing. The machine is turned on at the beginning of the day, takes a certain amount of time to reach its full power (the point at which it uses the most fuel per hour), runs for a certain number of hours, and is shut off at the end of the work day. The fuel usage per hour of the machine is represented by a periodic function. When does the machine first reach its full power?
A. After 4 hours
B. After 7 hours
C. After 2 hours
D. After 14 hours
Answer: C
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Find the area of the region specified in polar coordinates.The smaller loop of the curve r = 6 + 12 sin ?
A. 18(2? + 3
)
B. 9(2? - 3
)
C. 9(2? + 3
)
D. 18(2? - 3
)
The pH of a solution is 1.3. What is the pOH of the solution?
A. 1.3 B. 12.7 C. 0.11 D. 13.3
Solve the problem.A football team gained 29 yards on one play, lost 11 yards on another, and gained 34 yards on the last play of the first half. They had already gained 320 yards during the half. What was the total yardage gain for the first half?
A. 394 yards B. 268 yards C. 372 yards D. 383 yards
Factor the difference of squares.12a4 - 75b2
A. 3(2a2 + 5b)(2a2 - 5b) B. (6a2 + 15b)(2a2 - 5b) C. 3(2a2 + 5b)2 D. 3(2a2 - 5b)2