Find the exact value of y, or state that y is undefined.y = cos-1 (4)
A. 4
B. 0
C. ?
D. undefined
Answer: D
Mathematics
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Determine which two functions are inverses of each other.f(x) = x3 - 12g(x) = 
h(x) = x3 + 12
A. f(x) and g(x) B. f(x) and h(x) C. g(x) and h(x) D. None
Mathematics
Evaluate the integral.
A. 
x3 cos 9x + 
x2 sin 9x - 
x cos 9x - 
sin 9x + C
B. 
x3 sin 9x + 
x2 cos 9x - 
x sin 9x - 
cos 9x + C
C. 
x3 sin 9x + 
x2 cos 9x - 
x sin 9x - 
cos 9x + C
D. 
x3 sin 9x - 
x2 cos 9x + 
x sin 9x + 
cos 9x + C
Mathematics
Solve the problem.The polyniomial function f(x) = 6x3 + 25x2 + 12x - 7 has exactly one positive zero.Use the Intermediate Value Theorem to approximate the zero correct to 2 decimal places.
A. 0.66 B. 0.33 C. 0.10 D. 0.50
Mathematics
Multiply using the FOIL method.(x - 4)(x - 2)
A. x2 - 7x + 8 B. x2 + 8x - 6 C. x2 - 6x - 7 D. x2 - 6x + 8
Mathematics