Answer:
9
Step-by-step explanation:
8N=72
N=9
Answer:3
If x=0 or x=1 it is trivial, so 0<x<1. Define a=1−x2, then 0<a<1.
Step-by-step explanation:
Answer:
Rate of change of the area of the square is 42 units at t = 2.
Step-by-step explanation:
We note that the area of the square is given by:
but we aim to find
. But we can use the chain rule to pull out that dA/dt. Doing so gives us:

Now,
(by the power rule and 
But since we have "x" and not "t", we want to find what x is when t = 2. Substituting t = 2 gives us x(2) = 3(2) + 1 = 7.
So, finally, we see that:

Sonia practices for 96 mins (1 hour 36mins ) 0.8 = 80%
Answer:
185 bottles/hour
Step-by-step explanation:
680 bottles of milk/5 hours
divide both sides by 5
186 bottles of milk/hour