Answer:
where is the options? or is any given.
Step-by-step explanation:
Answer:
I'm pretty sure the answer is b
Answer:

Step-by-step explanation:
= Surface area of base = 5 square meters
Volume of water in tank = 70 cubic meters
The rate at which the volume is reducing is

Integrating from
to 

Volume of water remaining in the tank is 
Suface area of base
depth = Volume

The depth of the water remaining in the tank is
.
All you have to do is 14*.30 which equals to $4.20