The following table shows the number M, in thousands, of magazine subscriptions t years after initial publication. Use exponential regression to model the number of subscriptions as a function of time. Round your answer to two decimal places.
t 1.06 4.33 8.21 12.00 15.70 M 8.16 4.57 2.87 1.13 0.53?
A. ?
B. ?
C. 
D. ?
Answer: C
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Make an approximate conversion as indicated. Round to the nearest tenth. The precise value of your approximation will depend on the conversion path that you choose.163 lb = 
kg
A. 172.8 B. 414.0 C. 74.1 D. 358.6
Find the value of the objective function at each corner of the graphed region. Use this information to answer the question. 
Objective Functionz = x + 9yWhat is the maximum value of the objective function?
A. 30 B. 47 C. 22 D. 38
Use properties of logarithms to expand the logarithmic expression as much as possible. Where possible, evaluate logarithmic expressions without using a calculator.log7(7x)
A. x B. 1 + log7x C. 1 D. 7
Skeletal remains of the so-called "Pittsburgh Man", unearthed in Pennsylvania, had lost 74% of the carbon 14 they originally contained. Determine the approximate age of the bones. Hint: the decay constant k for carbon 14 is equal to 0.00012. ?
A. The approximate age of bones is 10,103 year(s). B. The approximate age of bones is 9,694 year(s). C. The approximate age of bones is 7,770 year(s). D. The approximate age of bones is 11,226 year(s).