85+3x-5=180 what does x equal
2 answers:
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Answer:
Must add 100 milliliters of water
Step-by-step explanation:
Let
x ----> milliliters of water to add
we know that
<em>Originally</em>
The milliliters of lemon concentrate is equal to the 10% of 100 mL
so
<em>Now</em>
The balance of lemon concentrate is equal to 5%
The milliliters of lemon concentrate is the same
so
solve for x
therefore
Must add 100 milliliters of water
Answer:
The confidence interval for the population mean μ is
Step-by-step explanation:
Given :
Number of weights of newborn girls n=185.
Mean hg
Standard deviation s=7.5 hg
Use a 95% confidence level i.e. cl=0.95
To find : What is the confidence interval for the population mean μ?
Solution :
Using t-distribution,
The degree of freedom
The t critical value is t=1.973.
The confidence interval build is
Substitute the values,
Therefore, the confidence interval for the population mean μ is