Provide an appropriate response.What does the graph of the equation x = 0 represent?
Fill in the blank(s) with the appropriate word(s).
The y-axis
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Express the value of the inverse hyperbolic function in terms of natural logarithms.tanh-1 
A. 
ln 1
B. 
ln 77
C. 
ln -7
D. 
ln 7
Solve.A plane traveling 410 mph in still air encounters a 60-mph headwind. How long will it take the plane to travel 770 mi into the wind? Round your answer to the nearest tenth of an hour, if necessary.
A. 0.5 hr B. 1.6 hr C. 2.2 hr D. 269,500 hr
Multiply or divide as indicated.
? 
A. 
B. 
C. 
D. 
In a study using 50 foreign-language vocabulary words, the learning rate L (in words per minute) was found to depend on the number of words already learned x, according to the equation 
. Use the intercepts to determine a window, and then use a graphing utility to graph the equation for 
style="vertical-align:middle;" /> Based on the graph, is the learning rate increasing or decreasing? ? A. increasing B. decreasing