Im pretty sure duncans friend is wrong but i may be as well lol sorry hope this helps
Answer:
15/56
Step-by-step explanation:
Total = 8
3/8 × 5/7
15/56
Just use derivatives:
f'(x)= .48x-.96 = 0, x = 2, since the coeff of x^2 is +, this is a minimum
x=0 1989, so x = 2 is 1991! :)
15 is the answer, I think.
The answer is 20 because her fence is 200 total so if you do 60 times 2 + 30 times 2 you get 180 200-180 = 20 sorry if i wrong
