The concentration x of a certain drug in an organ after t minutes is given by 
. Find the initial concentration of the drug when 
.
?
A. 0.03
B. 1.00
C. 0.00
D. 0.06
E. 0.08
Answer: C
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Solve the problem.On the April 2 billing date, Monica had a balance due of $1598.54 on her credit card. The transactions during the following month were: 
The interest rate on the card is 1.2% per month. Using the average daily balance method, find the finance charge on May 2 (April has 30 days).
A. $21.96 B. $20.85 C. $21.95 D. $22.05
Evaluate the improper integral.
A. 
B. 
C. 
D. 
Graph the ellipse. Label the intercepts.x2 + 4y2 = 64
A. (-4, 0), (4, 0), (0, -8), (0, 8)
B. (-8, 0), (8, 0), (0, -2), (0, 2)
C. (-8, 0), (8, 0), (0, -4), (0, 4)
D. (-2, 0), (2, 0), (0, -8), (0, 8)
Write an algebraic equation and use it to solve the problem.In 1999, City A experienced 18 armed robberies less than twice that of City B. In the two cities combined, 132 armed robberies occurred. How many armed robberies occurred in City A and in City B?
A. City A: 82 armed robberies; City B: 50 armed robberies B. City A: 57 armed robberies; City B: 75 armed robberies C. City A: 58 armed robberies; City B: 38 armed robberies D. City A: 32 armed robberies; City B: 100 armed robberies