Find the limit.
cos-1 x
A. 1
B. ?
C. -1
D. 0
Answer: D
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Divide.
A. -1 B. 8 C. -8 D. 1
The percentage 
of children who are able to speak in at least single words by the age of ?t months can be approximated by the equation.
?
?
What percent of children are able to speak in at least single words by the age of 12 months? Round to the nearest percent.
?
A. 8%
B. 67%
C. 92%
D. 85%
E. 79%
Factor completely. If the polynomial is prime, so state.16x2 - 25
A. (4x + 5)(4x - 5) B. (4x + 5)(4x + 5) C. (4x - 5)(4x - 5) D. prime
Use the Leading Coefficient Test to determine the end behavior of the polynomial function.f(x) = -6x3(x - 4)(x - 2)2
A. rises to the left and rises to the right B. falls to the left and rises to the right C. rises to the left and falls to the right D. falls to the left and falls to the right