Solve using the addition principle and/or the multiplication principle.
k = 4
A. 5
B. 20
C. 12
D. 11
Answer: B
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Rewrite without rational exponents, and simplify, if possible.(mn)1/7
A. 
B. 
C. 
D. (mn)-7
Subtract. Simplify, if possible.
- 
A. 3
B. 12
C. 7
D. 3
The graph of a function f is given. Use the graph to answer the question.For what numbers x is f(x) = 0?
A. -6, 7, 10 B. (-6, 7) C. (-10, -6), (7, 10) D. -6
Provide an appropriate response.Suppose that a ball is thrown straight down from the top of a building with an initial speed of 40 feet per second. If y represents the speed of the ball, in feet per second, and x represents the time, in seconds, after the ball is thrown, then 
a) Find the speed after 0, 2, and 4 seconds, and write the results as ordered pairs.b) Draw the graph for the above equation.c) From the graph, determine the time in seconds after the ball is dropped for it to reach a speed of 200 feet per second.
What will be an ideal response?