Solve the problem.Suppose you pay $1.00 to roll a fair die with the understanding that you will get back $3.00 for rolling 2 or 6. What are your expected winnings?
A. $3.00
B. -$2.00
C. $1.00
D. $0
Answer: D
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Find the component form of the specified vector.The vector 
, where P = (-3, -4) and Q = (10, 4)
A. 
B. 
C. 
D. 
Solve the problem.A certain radioactive isotope decays at a rate of 2% per 100 years. If t represents time in years and y represents the amount of the isotope left then the equation for the situation is 
In how many years will there be 90% of the isotope left?
A. 527 yr B. 246 yr C. 1000 yr D. 500 yr
Solve the problem.In a particular situation, the pressure, P, exerted on a person's eardrum at a distance of 8 feet from the source is given by the function: P(t) = 
cos (2n? - ct) , where n is a positive integer. Use the difference identity for cosine to simplify P in this situation.
A. P(t) = 
cos (ct)
B. P(t) = 
cos (ct + 8)
C. P(t) = 
cos (ct) - 
sin (ct)
D. P(t) = cos (ct)
Add.+ 
A. 981.212 B. 981.312 C. 981.302 D. 981.311