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. 531,441
C. 532,701
D. 530,241
Answer: B
Mathematics
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A PDF for a continuous random variable X is given. Use the PDF to find E(X).f(x) = 
A. 
B. 3
C. 
D. 
Mathematics
?What is the best reason for lining up the decimal point when adding or subtracting decimal numbers? ?
A. ?In order to line-up the place-values of each digit. B. ?In order to line-up the decimal point. C. ?In order to follow the procedure of the addition/subtraction algorithm. D. ?You cannot perform the operation otherwise. E. ?So you can annex zeros when necessary.
Mathematics
Graph the integer on a number line.4
A. 
B. 
C. 
D. 
Mathematics
Find the indicated term for the sequence.Find the 6th term of the sequence whose general term is an = 4(2n - 1).
A. 44 B. 54 C. 48 D. 40
Mathematics