Critical points is where the derivative (slope) is zero or does not exist. So to do this we have to find the derivative of our function:

So we apply chain rule:
=

Set our first derivative to zero and solve for x:
3(x^2 - 1) * 2x = 0
So we can see that (by plugging in) 0, -1 and 1 makes our solution true
So our critical value is x = 0, x = -1, x = 1
Answer: angle B will be 90°
Sum of the angles = 180°
Answer:
130.56
Step-by-step explanation:
Volume of the prism is 12×5×4.25=255 in³
Volume of the cubes are 1.25³=1.953125 in³
255/1.953125 = 130.56 in³
brainliest plz
Using the given table:
a) the average rate of change is 32.5 jobs/year.
b) the average rate of change is 12.5 jobs/year.
<h3>
How to find the average rate of change?</h3>
For a function f(x), the average rate of change on an interval [a, b] is:

a) The average rate of change between 1997 and 1999 is:

So the average rate of change is 32.5 jobs/year.
b) Now the interval is 1999 to 2001.
The rate this time is:

So the average rate of change is 12.5 jobs/year.
If you want to learn more about average rates of change:
brainly.com/question/8728504
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Step-by-step explanation:
this is all I can find I hope it helps you out us not I'm sorry