Solve the problem.A particular substance decays in such a way that it loses half its weight each day. How much of the substance is left after 7 days if it starts out at 16 grams?
A. 4 grams
B. 
gram
C. 8 grams
D. 
gram
Answer: B
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Use the root test to determine if the series converges or diverges.
A. Diverges B. Converges
Use a sum-to-product identity to rewrite the expression.cos 
- cos 
A. -2
B. -2
C. -2
D. -2
Solve the problem. First use front end rounding. Then find the exact answer.An assembly line can produce 387 bicycles each hour. At this rate find the number of bicycles produced in 21 hours.
A. Estimate: 8190 bicycles; exact: 8127 bicycles B. Estimate: 8000 bicycles; exact: 8127 bicycles C. Estimate: 8190 bicycles; exact: 7740 bicycles D. Estimate: 156,000 bicycles; exact: 7740 bicycles
Provide an appropriate response.Which one of the following is a description of the graph of the solution set for the system below?x2 + y2 ? 36 4x2 + 9y2 ? 36
A. The area inside the circle (defined by the first equation) and outside the ellipse (defined by the second equation), including both borders. B. The area inside the ellipse (defined by the second equation), including the border. C. The area inside the ellipse (defined by the second equation) and outside the circle (defined by the first equation), including both borders. D. None of these