Answer:
- Total number of cars having no defection

- Total number of cars out of 560 will have defects =

Step-by-step explanation:
As
- A car factory checks 320 cars, and
Total number of cars = 560
The number of cars defected out of the cars that have
been checked = 
The equation of the scenario will be:
⇒ 
so
- Total number of cars having no defection

- Total number of cars out of 560 will have defects =

Step-by-step explanation:
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Answer: 0.09523
Step-by-step explanation:
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.
The answer is -1.1
Hope you get it right