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2 years ago

HELP ME WITH THIS - FIRST ONE TO ANSWER GETS MARKED BRAINLIEST

Mathematics

2 answers:

ser-zykov [4K]2 years ago

4 0

Answer: 42

Step-by-step explanation:

shepuryov [24]2 years ago

4 0

You can mark him brainliest now

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For a polygon with 10 sides, which equation below represents the sum of the interior angles in the polygon?

Vlad1618 [11]

Answer:

Its Sum And The Is sum Is Sum

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3 years ago

Please help im confused :(

aev [14]

Answer:

precipitation then condensation

Step-by-step explanation:

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2 years ago

A new catalyst is being investigated for use in the production of a plastic chemical. Ten batches of the chemical are produced.

zzz [600]

Answer:

$CI=(66.54,78.46)$

Step-by-step explanation:

Given : A new catalyst is being investigated for use in the production of a plastic chemical. Ten batches of the chemical are produced. The mean yield of the 10 batches is 72.5% and the standard deviation is 5.8%. Assume the yields are independent and approximately normally distributed.

To find : A 99% confidence interval for the mean yield when the new catalyst is used ?

Solution :

Let X be the yield of the batches.

We have given, n=10 , $\bar{X}=72.5\%$ , s=5.8%

Since the size of the sample is small.

We will use the student's t statistic to construct a 995 confidence interval.

$\bar X\pm t_{n-1,\frac{\alpha}{2}}\frac{s}{\sqrt n}$

From the t-table with 9 degree of freedom for $\frac{\alpha}{2}=0.005$

$t_{n-1,\frac{\alpha}{2}}=t_{9,0.005}$

$t_{n-1,\frac{\alpha}{2}}=3.250$

The 99% confidence interval is given by,

$CI=72.5 \pm 3.25\frac{5.8}{\sqrt{10}}$

$CI=72.5 \pm 5.96$

$CI=(72.5+5.96),(72.5-5.96)$

$CI=(66.54,78.46)$

8 0

3 years ago

The coordinates of point A on a grid are (−1, 6). Point A is reflected across the y-axis to obtain point B. The coordinates of p

elena55 [62]

When you reflect across the y axis the y coordinate stays the same and the x coorrdinate changes sign so x = -1 goes to x = 1

Answer point B is (1,6)

6 0

2 years ago

patrick used 2 cups of sugar to make 6 dozen cookies, how much sugar does he need to use to make 36 cookies?

frez [133]

Hello! 12 make a dozen. 12 * 6 is 72. 72 cookies make 6 dozen. 2 cups of sugar are needed to make 6 dozen. 36 cookies is 3 dozen, because 3 * 12 is 36. 36 is ½ of 72, so we would need ½ of the amount of sugar needed for 6 dozen cookies for 3 dozen cookies. ½ of 2 is 1. There. 1 cup of sugar is needed to make 3 dozen cookies.

7 0

3 years ago