Solve the problem.The expression 6.45t + 6.9 can be used to predict the average number of e-mail messages, in billions, each day in Country X, t years after 2000. Predict the average daily number of e-mails in Country X in the year 2,006.
A. 12,945.6 billion
B. 45.6 billion
C. 19.35 billion
D. 31.8 billion
Answer: B
Mathematics
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Find the average value of the function f over the given region.f(x, y) = 7x + 9y over the region bounded by the coordinate axes and the lines 
and 
.
A. 
B. 52
C. 26
D. 39
Mathematics
Divide, if possible. If a quotient is undefined, state so.
A. 7 B. -7 C. -48 D. 48
Mathematics
Solve the problem.Robert and Paul each took some chips from a bag of potato chips which contains 
ounces of chips. Robert took 3
ounces of chips and Paul took 3
ounces of chips. How many ounces of chips were left in the bag?
A. 5
ounces
B. 6
ounces
C. 5
ounces
D. 4
ounces
Mathematics
Use Cramer's rule to solve the system of linear equations.0.670x + 2.773y = 13.1021.728x = 0.039y + 5.028
A. (3, 4) B. (-4, 3) C. (4, 3) D. (-3, -4)
Mathematics