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3 years ago

Solve for x. Help me pleaseee you’ll get a brainless answer!!

Mathematics

2 answers:

marishachu [46]3 years ago

7 0

Answer:

15.6 in

Step-by-step explanation:

since this is a right triangle we can use: SOA CAH TOA

in this case, since we know the opposite and hypotenuse of 40 degrees we can use sin

sin40° = 10/x

x·sin40° = 10

x = 10/sin40°

x = 15.6

julsineya [31]3 years ago

3 0

Answer:

x =15.55723827

Step-by-step explanation:

Since this is a right triangle, we can use trig functions

sin theta = opp/ hyp

sin 40 = 10/x

x sin 40 = 10

x = 10 / sin 40

x =15.55723827

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Step-by-step explanation:

We have that to find our $\alpha$ level, that is the subtraction of 1 by the confidence interval divided by 2. So:

$\alpha = \frac{1 - 0.9}{2} = 0.05$

Now, we have to find z in the Ztable as such z has a pvalue of $1 - \alpha$ .

That is z with a pvalue of $1 - 0.05 = 0.95$ , so Z = 1.645.

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$M = z\frac{\sigma}{\sqrt{n}}$

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$M = 3.25$

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The upper end of the interval is the sample mean added to M. So it is 34.09 + 3.25 = 37.34.

A 90% confidence interval for the mean number of letter sounds identified in one minute is: (30.84, 37.34).

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3 years ago

Montreal canadiens memorabilia is on sale for 40% off due to their disappointing season how much would a jersey that cost $80 be

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You mean 40% of 80?

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