Evaluate.23 - (-2)4
A. 14
B. 24
C. 25
D. -8
Answer: D
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Solve the problem.The function 
can be used to determine the milligrams D of a certain drug in a patient's bloodstream h hours after the drug has been given. How many milligrams will be present after 
Round the answer to two decimal places.
A. 607.55 mg B. 0.04 mg C. 2.97 mg D. 1.62 mg
Divide. Express the quotient as a mixed number in lowest terms. -1
÷ 
A. 1
B. 2
C. 1
D. 1
Sketch the graph of the function. Give the coordinates of the vertex.f(x) = (x + 6)2 - 1
A. vertex (6, -1)
B. vertex (-1, -6)
C. vertex (1, 6 )
D. vertex (-6, -1)
Use a graphing calculator to solve the system of equations. Round your solutions to one decimal place.1.6x + 1.7y + 4.0z = 4.55.8x - 7.0y + 1.1z = -4.44.7x - 3.5y - 5.3z = -0.1
A. (0.3, 0.4, 0.0) B. (1.1, 1.6, 0.0) C. (0.6, 0.8, 0.0) D. (0.9, 1.2, 0.0)