Simplify the expression.
A. 1
B. 
C. 64
D. 6
Answer: D
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Solve the problem.An auto mechanic finds that the interval time I, in minutes, between scheduled appointments must be related to the total number of minutes T that he is open each day and the number of scheduled oil changes N according to the formula 
If he wants to be open 9 hours each day, and feels that he can do each oil change in 20 minutes, how many appointments should he make in one day?
A. 2 B. 29 C. 145 D. 0
Determine whether the argument is valid or invalid. You may compare the argument to a common form, if applicable, or use a truth table.p ? qq ? p
A. Valid B. Invalid
Find the difference.-364 - 927
A. -463 B. -563 C. 563 D. -1291
Solve the problem.Suppose the amount of a radioactive element remaining in a sample of 100 milligrams after x years can be described by 
. How much is remaining after 164 years? Round the answer to the nearest hundredth of a milligram.
A. 0.02 mg B. 4199.54 mg C. 373.76 mg D. 2.38 mg