Check the subtraction. If the subtraction has not been done correctly, find the correct answer.
A. Incorrect; 630
B. Correct.
C. Incorrect; 614
D. Incorrect; 624
Answer: B
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Solve the problem.The length of time it takes college students to find a parking spot in the library parking lot follows a normal distribution with a mean of 6.0 minutes and a standard deviation of 1 minute. Find the probability that a randomly selected college student will find a parking spot in the library parking lot in less than 5.5 minutes.
A. 0.3551 B. 0.1915 C. 0.2674 D. 0.3085
Make the indicated conversion. 46.9 
to 
A. 9230 ft/h B. 554,000 ft/h C. 51,500 ft/h D. 154 ft/h
Solve the problem. Round to two decimal places if needed.A pendulum swings though an angle of 35° each second. If the pendulum is 45 inches long, how far does its tip move each second?
A. 27.49 inches B. 29.92 inches C. 25.64 inches D. 28.78 inches
Simplify.-13 + (-16) + (-8) + (-6) + 11 + (-1)
A. -33 B. 3 C. -55 D. 9