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victus00 [196]
3 years ago
6

Need help please and thank you

Mathematics
1 answer:
mojhsa [17]3 years ago
3 0

Answer:

(c) option

Step-by-step explanation:

A = 4pier²

A/4pie = r²

Under root (A/4pie) = r

(c) option

<em>Hope</em><em> </em><em>it</em><em> </em><em>helps</em><em>.</em>

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What is the smallest power of 10that would exceed 999999999991
lozanna [386]
10^12 

I hope that helps.
8 0
3 years ago
Solve this please. <br><img src="https://tex.z-dn.net/?f=3%28m%20-%205%29%20%2B%2011%20%3D%20%20-%2085" id="TexFormula1" title="
Vikki [24]

Answer:

Bro this some alien hyroglyphics

Step-by-step explanation:

7 0
3 years ago
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The mean annual cost of an automotive insurance policy is normally distributed with a mean of $1140 and standard deviation of $3
DerKrebs [107]

Using the normal distribution, it is found that the probabilities are given as follows:

a) 0.8871 = 88.71%.

b) 0.0778 = 7.78%.

c) 0.8485 = 84.85%.

<h3>Normal Probability Distribution</h3>

The z-score of a measure X of a normally distributed variable with mean \mu and standard deviation \sigma is given by:

Z = \frac{X - \mu}{\sigma}

  • The z-score measures how many standard deviations the measure is above or below the mean.
  • Looking at the z-score table, the p-value associated with this z-score is found, which is the percentile of X.
  • By the Central Limit Theorem, the sampling distribution of sample means of size n has standard deviation s = \frac{\sigma}{\sqrt{n}}.

The parameters in this problem are given as follows:

\mu = 1140, \sigma = 310, n = 16, s = \frac{310}{\sqrt{16}} = 77.5

Item a:

The probability is the <u>p-value of Z when X = 1250 subtracted by the p-value of Z when X = 1000</u>, hence:

X = 1250:

Z = \frac{X - \mu}{\sigma}

By the Central Limit Theorem

Z = \frac{X - \mu}{s}

Z = \frac{1250 - 1140}{77.5}

Z = 1.42

Z = 1.42 has a p-value of 0.9222.

X = 1000:

Z = \frac{X - \mu}{s}

Z = \frac{1000 - 1140}{77.5}

Z = -1.81

Z = -1.81 has a p-value of 0.0351.

0.9222 - 0.0351 = 0.8871 = 88.71% probability.

Item b:

The probability is <u>one subtracted by the p-value of Z when X = 1250</u>, hence:

1 - 0.9222 = 0.0778 = 7.78%.

Item c:

The probability is the <u>p-value of Z when X = 1220</u>, hence:

Z = \frac{X - \mu}{s}

Z = \frac{1220 - 1140}{77.5}

Z = 1.03

Z = 1.03 has a p-value of 0.8485.

0.8485 = 84.85% probability.

More can be learned about the normal distribution at brainly.com/question/4079902

#SPJ1

3 0
2 years ago
Find the slope of the line that passes through the two given points of (-3, 4) and (-3, -8)
Lynna [10]

Answer:

it is not express because the line is parallel at y axis

Step-by-step explanation:

8 0
3 years ago
Factor completely y^2-xy-56x^2
olga2289 [7]
You can factor this out by thinking of the factors of 56 that have a sum of -1. 7 and 8 are factors of 56 and to get a sum of -1, 8 should be negative. 7 + -8 = -1

So y^{2} - xy -  56x^{2} factored out is (y+7x)(y-8x)

We can check this using FOIL
F = (y)(y) = y^{2}
O = (y)(-8x) = -8xy
I = (7x)(y) = 7xy 
L = (7x)(-8x) = -56x^{2}
y^{2} - 8xy + 7xy - 56x^{2} Combine like terms
y^{2} - xy - 56x^{2}
3 0
3 years ago
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