SOLUTION: A water cooler is set out during a half-marathon and contains 5 gallons of water. If the water in the cooler decreases at a rate of 13% each hour, which function represents the amo

Algebra ->  Test -> SOLUTION: A water cooler is set out during a half-marathon and contains 5 gallons of water. If the water in the cooler decreases at a rate of 13% each hour, which function represents the amo      Log On


   

Question 1187444: A water cooler is set out during a half-marathon and contains 5 gallons of water. If the water in the cooler decreases at a rate of 13% each hour, which function represents the amount of water left in the cooler?
Found 2 solutions by ikleyn, josgarithmetic:
Answer by ikleyn(52778) About Me  (Show Source):
You can put this solution on YOUR website!
.

When you say  " decreases at a rate of 13% each hour ",  you  (or the problem)  MUST  TELL   " 13%  of  WHAT  ? ".


Otherwise,  it is not a Math problem,  at all.



As I see,  there is a flow of so called  " quasi "- math problems from an illiterate and unqualified  " composer "   at this time . . .



Answer by josgarithmetic(39617) About Me  (Show Source):
You can put this solution on YOUR website!
Starts with 5 gallons to decrease 13% each hour, means at some small quantity you need to decide when so little water remains that the container may be called empty.

The container KEEPS 87% each hour.
vgallons
thours

v=5%280.87%29%5Et------this by itself will never become 0.