Answer the question.The code for some garage door openers consists of 12 electrical switches that can be set to "+" , "0" , or "-" by the owner. With this type of opener, how many different codes are possible?
A. 531,193
B. 530,241
C. 532,701
D. 531,441
Answer: D
Mathematics
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Solve the problem.The half-life of Antimony 111 is 2.9 hours. If the formula 
gives the percent (as a decimal) remaining after time t (in hours), sketch P versus t. 
A. 
B. 
C. 
D. 
Mathematics
Solve.Suppose 5 cards are drawn from a deck of 52 cards. What is the probability of drawing 4 jacks with any other card?
A. 
B. 
C. 
D. 
Mathematics
Solve the system by elimination. x - 5y = 353x - 6y = 51
A. {(5, -6)} B. {(-5, -5)} C. {(4, -5)} D. ?
Mathematics
Perform the indicated operation. Simplify if possible.
- 
A. 
B. 
C. 
D. 
Mathematics