slope =
the slope is the value of f' (36)
f(x) = √x =
f'(x) =
=
f'(36) = =
If f(x) =2x+3 then the point (1,5) is on the graph of f true or false
1 answer:
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Answer:
a) see below
b) 40x20 meters
Step-by-step explanation:
Write down what you know:
- The area of the enclosure is length*width, so
- The length of the fencing is 80 meters, so
Now we have to combine these two equations above, and get rid of y in the process.
First rewrite the second as:
Then substitute for y in the first:
b) To maximize A, find the zero of the first derivative:
So y = (80-40)/2 = 20 meters.