Kelly P.

asked • 07/27/15

4 questions about functions

1. The number of milligrams of a drug that remains in a patient's system after t hours is given by the function A(t) = Iert. Ted was given 200 milligrams of medicine which leaves his bloodstream at a rate of 20%. How much of the medicine remains in his system after 4 hours?
Choose one answer.
A. 89.87 mg
B. 69.31 mg
C. 22.87 mg
D. 11.54. mg

2. Solve the equation 9 = square root of 27(4x + 6). Using complete sentences, explain the strategy used in solving this equation.

3. The formula for determining interest compounded monthly is A = P(1 + r over 12)12t, where A represents the amount invested after t years, P the principal invested, and r the interest rate. Jimmy invests $2,000 at an interest rate of 10% for 4 years, while Jenny invests $2,000 at an interest rate of 5% for 8 years. Determine the amount of return gained by Jimmy and Jenny. In complete sentences, summarize your results.

4. Describe the graphs of the functions f(x) = 2x - 1 and g(x) = -2x - 1. Compare and contrast the domain and range of f(x) and g(x).

1 Expert Answer

By:

Raymond B. answered • 08/16/21

Tutor
5 (1)

Math, microeconomics or criminal justice

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