y = 500-(t25)
y is the amount of water
500-(t25) subtracts 25 liters every hour from 500, due to it multiplying the 25
Well it’s simply the answer
S = 4pi r^2
S/4pi = r^2
taking square root on both sides,
r = sqrt (S/4pi)
I’d say D, bc minor and major are definitely not it