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Soloha48 [4]
3 years ago
8

Someone please answer this, I’ll give you brainliest and 50 points!

Mathematics
2 answers:
8090 [49]3 years ago
7 0

Answer:

3

Step-by-step explanation:

pickupchik [31]3 years ago
4 0

Answer:

Answer 2

Step-by-step explanation:

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789,091 to the nearest ten thousand is

790,000

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In the children’s game Don’t Break the Ice, small plastic ice cubes are squeezed into a square frame. Each child takes a turn ta
guajiro [1.7K]

Answer:

(29.46 mm, 29.54 mm).

Step-by-step explanation:

We have the standard deviation for the sample, so we use the t-distribution to solve this question.

The first step to solve this problem is finding how many degrees of freedom, we have. This is the sample size subtracted by 1. So

df = 43 - 1 = 42

95% confidence interval

Now, we have to find a value of T, which is found looking at the t table, with 42 degrees of freedom(y-axis) and a confidence level of 1 - \frac{1 - 0.95}{2} = 0.975. So we have T = 2.018

The margin of error is:

M = T\frac{s}{\sqrt{n}} = 2.018\frac{0.12}{\sqrt{43}} = 0.04

In which s is the standard deviation of the sample and n is the size of the sample.

The lower end of the interval is the sample mean subtracted by M. So it is 29.5 mm - 0.04mm = 29.46 mm

The upper end of the interval is the sample mean added to M. So it is 29.5 mm + 0.04mm = 29.54 mm

The 95% confidence level for the true mean width is: (29.46 mm, 29.54 mm).

5 0
3 years ago
WILL MARK BRAINLEIST!!
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Answer:

x = 12.26

Step-by-step explanation:

sin  = opp/hyp

sin 50 = x/16

multiply both sides by 16

16 * sin50 = x

Use calculator

x = 12.256711089903649

Rounded

x = 12.26

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Write the fraction below as a sum or difference. 5x + 2 over 7​
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