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3 years ago

20per%20hour%3F" id="TexFormula1" title="Maria earns $603.75 for 35 hours of work. What is her rate of pay per hour?" alt="Maria earns $603.75 for 35 hours of work. What is her rate of pay per hour?" align="absmiddle" class="latex-formula">
I legit forgot how to divide for some reason Can someone drop down the work for this question?

Mathematics

1 answer:

Solnce55 [7]3 years ago

4 0

Answer:$17.25 is her rate per hour

Step-by-step explanation:

Do 603.75/35

Which $17.25

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3. Tim and Juan are both animal lovers. Tim owns 2 cats, 3 dogs, 1 Guinea pig and 3 hamsters and represents this mathematically

LenaWriter [7]

Answer:

Juan- 1c+6d+5g

Together- 3c+9d+6g+3h

Step-by-step explanation:

Add their pets together

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2 years ago

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A chemist examines 15 geological samples for potassium chloride concentration. The mean potassium chloride concentration for the

NikAS [45]

Answer:

$0.376-2.145\frac{0.0012}{\sqrt{15}}=0.375$

$0.376+2.145\frac{0.0012}{\sqrt{15}}=0.377$

And we are 95% confident that the true mean of chloride concentration is between 0.375 and 0.377 cc/ cubic meter

Step-by-step explanation:

Data provided

$\bar X=0.376$ represent the sample mean for the chloride concentration

$\mu$ population mean (variable of interest)

s=0.0012 represent the sample standard deviation

n=15 represent the sample size

Confidence interval

The confidence interval for the mean is given by the following formula:

$\bar X \pm t_{\alpha/2}\frac{s}{\sqrt{n}}$ (1)

Since we need to find the critical value first we need to begin finding the degreed of freedom

$df=n-1=15-1=14$

The Confidence is 0.95 or 95%, the significance would be $\alpha=0.05$ and $\alpha/2 =0.025$ , and the critical value for this case with a t distribution with 14 degrees of freedom is $t_{\alpha/2}=2.145$