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3 years ago

Can someone please explain to me how I do this?

Mathematics

2 answers:

Nastasia [14]3 years ago

6 0

Answer:

x = 12.77 cm

Step-by-step explanation:

In this problem, we will use trigonometry to find the missing value. I will use the 70 degree angle to find it.

12cm is the opposite value for 70, and x is the hypotenuse. We will use Sine to solve this problem.

Since we are missing the hypotenuse, we set up the equation like this -

x = 12/Sin(70)

This leads us to our answer, x=12.77 cm (rounded)

Hunter-Best [27]3 years ago

6 0

Check the picture below.

make sure your calculator is in Degree mode.

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Sum of difference = 2532+ 3664+740+150 −805+ 560 +390 +285 = 7516

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$=\sqrt{\dfrac{(2532-939.5)^2+(3664-939.5)^2+(740-939.5)^2 ...+(285-939.5)^2}{8-1}}$

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c)Calculate a 99% two-sided confidence interval on the difference in mean life.

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significance level =α= 0.01

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confidence interval $= 939.5 \pm 3.499 \times \frac{1441.21}{\sqrt{8}} \right)$

confidence interval $= 939.5 - 3.499 \times \frac{1441.21}{\sqrt{8}} \right)$ to $= 939.5 + 3.499 \times \frac{1441.21}{\sqrt{8}} \right)$

Confidence interval $−843.396\$ to $2722.396$

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Help I’m timed I’ll mark u brainliesttt

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