The graph of a function f is given. Use the graph to answer the question.How often does the line y = -20 intersect the graph?
A. once
B. twice
C. does not intersect
D. three times
Answer: C
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Simplify the expression. Write the answer using positive exponents.
A. - 
B. 
C. - 
D. x8y8
Graph the function.f(x) = 
x
A. 
B. 
C. 
D. 
Evaluate the integral.
A. - 880 B. - 1280 C. - 400 D. 320
A boat travels upstream (against the current) between two points on a river 10 mi apart in 2.5 hours. The return trip downstream takes only 45 minutes. What is the boat's speed, and how fast does the current in the river flow?
(a) The speed of the boat is 4.5mi/h and the speed of the current flow is about 8.4 mi/h. (b) The speed of the boat is 8.7 mi/h and the speed of the current flow is about 4.7 mi/h. (c) The speed of the boat is 6.7 mi/h and the speed of the current flow is about 8.7 mi/h. (d) The speed of the boat is 5 mi/h and the speed of the current flow is about 4 mi/h. (e) The speed of the boat is 13.7 mi/h and the speed of the current flow is about 6.7 mi/h.