(6 + 4)(-12)

Mathematics

2 answers:

san4es73 [151]4 years ago

7 0

-120 should be the correct answer.
$6 + 4 = 10$
$10 \times ( - 12) = ( - 120)$

Igoryamba4 years ago

7 0

Do 6 plus 4 because in Pemdas addition comes first. 6+4=10 then multiply 10 by -12 and a positive times a negative will always equal a negative therefore 10 times -12 equals negative 120

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SOLUTION:

Step 1 :

In this question, we are told that a marketing research company needs to estimate the average total compensation of CEOs in the service industry.

We also have that: Data were randomly collected from 38 CEOs and the 98% confidence interval was calculated to be ($2,181,260, $5,836,180).

Then, we are asked to find the margin error for the confidence interval.

Step 2:

We need to recall that:

$\text{Higher Confidence Interval, CI}_{H\text{ = }}X\text{ + }\frac{Z\sigma}{\sqrt[]{n}}$ $\text{Lower Confidence Interval , CI}_{L\text{ }}=\text{ X - }\frac{Z\sigma}{\sqrt[]{n}}$

It means that:

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where,

$CI_H\text{ = }$$5,836,180$\text{ }$$$$ $CI_{L\text{ }}=\text{ }2,181,260$

putting the values into the equation for the margin of error, we have that:

$\text{Margin of error,}\frac{Z\sigma}{\sqrt[]{n}\text{ }}\text{ = }\frac{5,836,180\text{ - }2,181,260\text{ }}{2}$ $\begin{gathered} =\text{ }\frac{3654920}{2} \\ =1,\text{ 827, 460} \end{gathered}$

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5 0

1 year ago

My question is in the picture!

harina [27]

-5 4/5 because it is less than -5

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