Answer:
11:50
Step-by-step explanation:
Go back 40 min before 12:20
Answer:
A. 4.2 times
Step-by-step explanation:
Chlorine level of the pool as adjusted by Paula = 6.3 parts per million
Ideal Chlorine level as suggested by the magazine = 1.5 parts per million.
Thus, the number of times the ideal level of Chlorine that the current level is = current level ÷ ideal level
=
The current Chlorine level is 4.2 times the ideal Chlorine level.
Its C. 4.31 x 10^-5 = 0.0000431
Answer:
-4??
Step-by-step explanation: