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lawyer [7]
3 years ago
15

I need help in this .each unit costs 14p.how much do 942 units costs?

Mathematics
1 answer:
ValentinkaMS [17]3 years ago
6 0

Answer:

If each unit costs 14 (p?), then 942 units will cost 13,188.

Step-by-step explanation:

942 times 14 is 13,188

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The manager of a grocery store has taken a random sample of 100 customers. The average length of time it took these 100 customer
AlladinOne [14]

Answer:

4-2.326\frac{1}{\sqrt{100}}=3.767    

4+2.326\frac{1}{\sqrt{100}}=4.233    

So on this case the 98% confidence interval would be given by (3.767;4.233)

Step-by-step explanation:

Previous concepts

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 means 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.

Normal distribution, is a "probability distribution that is symmetric about the mean, showing that data near the mean are more frequent in occurrence than data far from the mean".

\bar X=4 represent the sample mean

\mu population mean (variable of interest)

\sigma=1 represent the population standard deviation

n=100 represent the sample size  

Solution to the problem

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

\bar X \pm z_{\alpha/2}\frac{\sigma}{\sqrt{n}}   (1)

Since the Confidence is 0.98 or 98%, the value of \alpha=0.02 and \alpha/2 =0.01, and we can use excel, a calculator or a table to find the critical value. The excel command would be: "=-NORM.INV(0.01,0,1)".And we see that z_{\alpha/2}=2.326

Now we have everything in order to replace into formula (1):

4-2.326\frac{1}{\sqrt{100}}=3.767    

4+2.326\frac{1}{\sqrt{100}}=4.233    

So on this case the 98% confidence interval would be given by (3.767;4.233)

   

4 0
3 years ago
Give the exponential function A(x)=P(1+r)x, what value for r will make the function a growth function?
wolverine [178]

for this to be a growth function it has to be any number that is latger than zero

FOR EXAMPLE :-

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4 0
3 years ago
10. Evaluate each function for the given value of x, and write the input x
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Answer

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Step-by-step explanation:

I took this and got all of it right

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2 years ago
Please fill out the questions on the right, i will do the graph
valkas [14]

Answer:

Step-by-step explanation:

for the first one is

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Range:  

(−7,∞),{y|y>−7}

Horizontal Asymptote:

y=−7

y-intercept(s):  

(0,−6)

the second one is

y-intercept(s):

(0,8)

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(−∞,∞),{x|x∈R}

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7 0
3 years ago
A toy car can go 5 mph. How long would it take to go 7 miles?
Radda [10]

Answer:

by the way what grade are you in? If you are more than 7th grade can you help me? brainly.com/question/16233847

35 mph

Step-by-step explanation:

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