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3 years ago

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)

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Give the exponential function A(x)=P(1+r)x, what value for r will make the function a growth function?

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3 years ago

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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

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valkas [14]

Answer:

Step-by-step explanation:

for the first one is

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(−∞,∞),{x|x∈R}

Range:

(−7,∞),{y|y>−7}

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y=−7

y-intercept(s):

(0,−6)

the second one is

y-intercept(s):

(0,8)

Horizontal Asymptote:

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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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3 years ago