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.
The answer is 58/100 or 29/50ths
1.2048192771084%
Because 830 times .012048192771084 equals 840 which is 70 times 12
1. 24÷12 =$2 $2 is the answer
2. $140÷$20=7 $270÷$45=6. Elisa and the reason is <---- the working out