If we have the function our derivative would be . If we need our slope at point (3, 10) we plug the x into our derivative, we get: . Which results in .
Now we need to find some equation that crosses the point (3, 10) with the following form , we can do this by plugging in our coordinates and our slope: , which gives us: . Our equation would look like: . Which is A.
I would say he is 24. Because .
Now solve the equation for x:
(note: I'm doing this so our denominator is the same on both sides)
Correct answer would be B.