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3 years ago

14

Three friends decide to pool their money together to buy a video game. John has $12. Stephanie has $15, and Laura has $10. How m

uch money do they have all together?

1 answer:

lesantik [10]3 years ago

8 0

Answer:

37$

Step-by-step explanation:

this problem can actually be solved with a calculator!

12 + 15 + 10 =

37

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Refer to the accompanying TI-83/84 Plus calculator display of a 95% confidence interval. The sample display results from using a

nikklg [1K]

Answer:

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Step-by-step explanation:

We have given,

The Z interval (23.305,25.075)

Mean $\bar{x}=23.69$

Sample n=30

To find : The confidence interval?

Solution :

We know, The confidence interval is in the format of

$\bar{x}-E$

E denotes the margin of error,

$E=\frac{U-L}{2}$

Where, U is the upper limit U=25.075

L is the lower limit L=23.305

$E=\frac{25.075-23.305}{2}$

$E=\frac{1.77}{2}$

$E=0.885$

Substitute the value of E and $\bar{x}$ in the formula,

$23.69-0.885$

$22.805$

Therefore, The confidence interval is $22.805$

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Step-by-step explanation:

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Step-by-step explanation:

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