SOLUTION: a particular chemical must be added to a swimming pool at regular intervals because it is released from the water into the air at the rate of 5% per hour. sixteen ounces of chemica

Question 918405: a particular chemical must be added to a swimming pool at regular intervals because it is released from the water into the air at the rate of 5% per hour. sixteen ounces of chemical is added at 8am. at what time will three-fourths of this chemical be gone from the pool?
Answer by josgarithmetic(39799) (Show Source): You can put this solution on YOUR website!
Assuming exponential decay,
c, how many ounces of chemical in the pool
t, amount of time after chemical addition, in hours
0.05 of amount lost every hour means 0.95 of amount is kept every hour.
----you could also choose a somewhat different format using base e, but the one chosen here should be understandable.

The question signifies, let and solve for t. Use t to determine the time during the day when this 12 ounces is reached.
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