Solve the problem.Suppose that the amount of oil pumped from a well decreases at the continuous rate of 
per year. When, to the nearest year, will the well's output fall to one-eighth of its present value?
A. 19 years
B. 13 years
C. 9 years
D. 2 years
Answer: B
Mathematics
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Find the area of the specified region.Inside the circle r = -8 cos ? and outside the circle r = 4
A. 
?
B. 8?
C. 
(2? + 3
)
D. 
(4? - 3
)
Mathematics
Determine whether the statement is true or false.
?
If 
?
A. True B. False
Mathematics
Write the expression using a single radical sign. Assume that all variables represent positive real numbers. Simplify the radicand if possible.
A. 
B. ab 
C. 
D. ab 
Mathematics
Solve.Find the sum of the first 403 odd natural numbers.
A. 162,812 B. 163,216 C. 161,604 D. 162,409
Mathematics