There’s no picture sooooooooooooooooo no clue sorry
...so...um......
...."..........gusse I’ll........be leaving now.......................have a.... nice day I guess
Step-by-step explanation:
10000-(10000n/20) = 10000 - (500n)
6500 = 10000 - 500n
3500 = 500n
n = 7
The most general proccedure for this type of problems is the following:
For a quadratic function of the following form
; where b and c are real numbers.
1) Identify the value that accompanies the x, that is, the value "b"
2) Divide the value of b by 2 and then square it: 
3) Add and subtract in the function the value of 
4) Write the complete function of the form
For the function presented
the result is as follows:
1) The value of b is 12
2) 
3) 
4)
Finally the function is:

The zero pair that must be added is 36 and -36
Fountain
A = pi * 10^2
A = 100pi
Garden
A = pi * 200^2
A = 40,000pi
40,000pi - 100pi = 39,900 m^2
Do you mean 0.75? Or 75? If you meant 32% of 75 it's 24.... But if you meant 32% of 0.75 it's 0.24.
Hope this helps! <3