Determine the amplitude or period as requested.Period of y = 9 cos 
A. 
B. 
C. 
D. 
Answer: C
Mathematics
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Use a calculator to evaluate the expression, or state that the value does not exist. Round the answer to four decimal places when necessary.tanh-1 4
A. does not exist B. 0.9993 C. 0.2554 D. 1.0007
Mathematics
Use the horizontal line test to determine whether the function is one-to-one.
A. Yes B. No
Mathematics
Solve.76 = -10x + 6
A. x = 84 B. x = 13 C. x = -7 D. x = 80
Mathematics
Find the root.
A. Not a real number B. -10 C. 15.811 D. 31.623
Mathematics