At noon, a tank contained 10 cm of water. after several hours, it contained 7 cm of water. what is the percent decrease of water
1 answer:
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Answer: -1.78
Step-by-step explanation:
As per given description, we have
Population proportion :
Sample size : n= 500
Sample proportion :
Test statistic for population proportion :-
Hence, the test statistic for this hypothesis test for a proportion= -1.78
The equation of direct variation is,
Substitute the values of <em>y</em> and <em>x</em>.
So, the obtained equation will be <em>y</em>=1.35(x).
Let's check with the values of <em>x</em>.
1) If <em>x</em>=4
2) If <em>x</em>=2
3) If <em>x</em>=-2