Solve the problem.Iodine-131 is a radioactive isotope of iodine that is used to treat hyperthyroidism. If a sample of 42 milligrams of iodine-131 is present initially, the number of milligrams that remain after x days can be modeled by the function f(x) = 42e-0.079x. How many milligrams will remain after 5 days? Round to the nearest tenth of a milligram
A. 38.8 milligrams
B. 62.3 milligrams
C. 28.3 milligrams
D. 37.9 milligrams
Answer: C
Mathematics
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Use limits to describe the behavior of the rational function near the indicated asymptote.f(x) = 
Describe the behavior of the function near its vertical asymptotes.
A. 
f(x) = ?, 
f(x) = -? , 
f(x) = ?, 
f(x) = -?
B. 
f(x) = 0, 
f(x) = -? , 
f(x) = -?, 
f(x) = 0
C. 
f(x) = -?, 
f(x) = 0 , 
f(x) = -?, 
f(x) = ?
D. 
f(x) = ?, 
f(x) = -? , 
f(x) = -?, 
f(x) = ?
Mathematics
Add or subtract. Simplify the answer.
+ 
A. 
B. 
C. 
D. 
Mathematics
Solve the problem.The perimeter of a rectangle is 30 inches and its area is 36 square inches. What are its dimensions?
A. 3 in. by 12 in. B. 4 in. by 11 in. C. 2 in. by 11 in. D. 2 in. by 13 in.
Mathematics
Solve.
= 
A. 
B. 
C. 
D. 
Mathematics