The x-intercepts are indeed -1 and 1.
The increasing intervals are listed as (-1, 0) u (1, infinity) not because -1 and 1 are not included points of the function, but because the function is not differentiable in those points, so you can't tell whether the function is increasing or decreasing there.
Answer: 23
Step-by-step explanation:
C) 88
Explanation: trust me
The answer is 75. You can find this using the equation 9 = 0.12x and then dividing 9 by 0.12 or 12%.
