5 + 17a is the answer you are looking for
A=1/2ap
(40ft^2)=1/2*8*p
p=(40ft^2)/4
Cathy drank 1,000 ml of water which means she drank 1 liter.
Initial dep for A = $200
for A, B, C :
initial dep + 6 (monthly rent) = $5150
For A:
$200 + 6(monthly rent A) = $5150
monthly rent A = (5150 - 200) / 6 = $825
For B:
monthly rent B = monthly rent A - $25 = $800
initial dep B + 6(800) = 5150
initial dep B = 5150 - 4800 = $350
For C:
initial dep C = initial dep B + $150 = $500
$500 + 6(monthly rent C) = 5150
monthly rent C = (5150 - 500) / 6 = $775