Solve the problem.After an injection, the amount of a medication A in the bloodstream decreases with time t, in hours. Suppose that under certain conditions A is given by A(t) = 
, where Ao is the initial amount of the medication given. Assume that an initial amount of 25.0 cc is injected. According to this function, does the medication ever completely leave the bloodstream?
A. Yes
B. No
Answer: B
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Solve the problem.Allied Radio is a company which makes clock radios. The following table gives the profit, y, in dollars that this company made during the three stated years, x.
This set of data can be modeled by f(x) = ax2 + bx + c, where x represents the year. Find a linear system for which the solution represents the values of a, b, and c. Use technology to solve this system. Then, using the quadratic equation, predict the profit that Allied Radio made in the year 1996. Round your answer to the nearest hundred dollars.
A. $399,600 B. $399,900 C. $400,100 D. $399,400
Write the given number in the situation as an integer.Mary's stock lost $1800 in value last year.
A. -$1800 B. $1800
Write an equivalent expression with negative exponents.
A. 
B. -8y-2
C. 4y-2
D. (4y)-2
Solve the system of linear equations by the method of elimination. Find (x,y) and check your solution algebraically.
?
?
A. ?
B. 
C. ?
D. ?
E. ?