Find the exact value of the expression or state that it does not exist.cos-1
A. 
B. 
C. 
D. 
Answer: D
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Determine the correct exponential function of the form f(x) = bx whose graph is given.
A. f(x) = 
x
B. f(x) = 5x
C. f(x) = 
x
D. f(x) = 9x
Explain why the function is not a polynomial function.f(x) = x5/4 - x6 + 10
Fill in the blank(s) with the appropriate word(s).
Solve the rational inequality. Express the solution in interval notation.
< x
A. (-?, -6) ? (0, ?) B. (-6, -2) ? (0, ?) C. (-?, 2) ? (6, ?) D. (-?, -6) ? (-2, 0)
Solve the problem.The concentration of alcohol in a person's blood is measurable. Suppose that the risk R (given as a percent) of having an accident while driving a car can be modeled by the equation R = 5ekxwhere x is the variable concentration of alcohol in the blood and k is a constant.Suppose that a concentration of alcohol in the blood of 0.07 results in a 10% risk 
of an accident. Find the constant k in the equation.Using this value of k, what is the risk if the concentration is 0.11?
What will be an ideal response?