Find the numbers at which f is continuous. At which numbers is f discontinuous?f(x) = 
A. continuous for all real numbers except x = 9, x = 8
B. continuous for all real numbers except x = 0, x = 8
C. continuous for all real numbers except x = 8
D. continuous for all real numbers
Answer: C
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The number N, in millions, of Americans with Internet access t years after 1990 is modeled by the function
.
According to this model, what is the maximum number of Americans who will ever have Internet access? Round your answer to two decimal places , if necessary.
?
A. 198.8 million B. 99.40 million C. 2.16 million D. 91 million
Perform all operations in correct order.42 + 22
A. 24 B. 36 C. 20 D. 12
Write the expression as the sum or difference of logarithms.logb 
A. 2logb m + 3logb n B. 3logb n - 2logb m C. logb (2m - 3n) D. 2logb m - 3logb n
Find the exact value under the given conditions.sin ? = 
, 0 < ? < 
; cos ? = 
, 0 < ? < 
Find cos (? + ?).
A. 
B. 
C. 
D. 