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In-s [12.5K]
3 years ago
9

Suppose the juice boxes go on sale for $1.79 for the eight 4.23-ounce

Mathematics
1 answer:
lara [203]3 years ago
5 0
Yes it does shegehehehavueheuwbuehwhwb
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Kate is 3 years old. Her brother, Scott is 10 years old. A. What is the ratio of Scott's age to Kate's age. B. How many times ol
Dafna1 [17]

Answer:Scott is over 3 times older that Kate

Step-by-step explanation:

Kate is 3 years old. Her brother, Scott is 10 years old.

A) The ratio of Scott's age to Kate's age would be Scott's age divided by Kate's age. It becomes

10/3

B) To determine how many times older than Kate is Scott, we would express the ratio of their ages in decimal. Therefore

10/3 = 3.33

Therefore, Scott is over 3 times older that Kate

8 0
2 years ago
Read 2 more answers
A random sample of 9 wheels of cheese yielded the following weights in pounds has a sample mean of 20.90 and a sample variance o
Ronch [10]

Answer:

2.002 \leq \sigma^2 \leq 11.365

Step-by-step explanation:

1) Data given and notation

s represent the sample standard deviation

s^2 represent the sample variance

n=9 the sample size

Confidence=90% or 0.90

A confidence interval is "a range of values that’s likely to include a population value with a certain degree of confidence. It is often expressed a % whereby a population mean or variance lies between an upper and lower interval".  

The margin of error is the range of values below and above the sample statistic in a confidence interval.

The Chi Square distribution is the distribution of the sum of squared standard normal deviates .

2) Calculating the confidence interval

The confidence interval for the population variance is given by the following formula:

\frac{(n-1)s^2}{\chi^2_{\alpha/2}} \leq \sigma \frac{(n-1)s^2}{\chi^2_{1-\alpha/2}}

On this case we need to find the sample standard deviation with the following formula:

s=sqrt{\frac{\sum_{i=1}^9 (x_i -\bar x)^2}{n-1}}
The sample variance given was [tex]s^2=3.45

The next step would be calculate the critical values. First we need to calculate the degrees of freedom given by:

df=n-1=9-1=8

Since the Confidence is 0.90 or 90%, the value of \alpha=0.1 and \alpha/2 =0.05, and we can use excel, a calculator or a table to find the critical values.  

The excel commands would be: "=CHISQ.INV(0.05,8)" "=CHISQ.INV(0.95,8)". so for this case the critical values are:

\chi^2_{\alpha/2}=15.507

\chi^2_{1- \alpha/2}=2.732

And replacing into the formula for the interval we got:

\frac{(9)(3.45)}{15.507} \leq \sigma \frac{(9)(3.45)}{2.732}

2.002 \leq \sigma^2 \leq 11.365

7 0
3 years ago
If on a scale 75 feet is represented by 1 inch, then a scale of 1/5 inch represents how many feet?
lara [203]

Answer:

15 feet

Step-by-step explanation:

if 1 inch represents 75 and it 1/5 then you do 75 divided by 5 and it gives you 15 so it represents 15 feet

8 0
3 years ago
A photograph has a length that is 4 inches longer than its width, x. Its area is given by the expression x(x + 4). If the area o
xxTIMURxx [149]

Answer:

The length is 12 inches and the width is 8 inches.

Step-by-step explanation:

6 0
3 years ago
Write words to match the expression.<br><br> 3+(4x12)
IgorLugansk [536]
Add three to the product of 4 times twelve
3 0
3 years ago
Read 2 more answers
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