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Tcecarenko [31]
3 years ago
7

Please help me because I am an incompetent small brain :0

Mathematics
1 answer:
sdas [7]3 years ago
7 0
I’m pretty sure it is (7, 2)
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How is multiplying two decimals different from multiplying one decimal by a whole number?
Natasha2012 [34]

Answer: The major difference is that after you have finished multiplying all the terms (while ignoring the decimal points), you have to add up how many decimal places there are in the factors, and put that many decimal places in the answer.

Step-by-step explanation:

4 0
3 years ago
Jumbo eggs in Australia, on average, are supposed to weigh 68g. Margot is in charge of a quality control test that involves weig
Andrej [43]

Answer:

0.9987 = 99.87% probability that the mean weight of 4 eggs in a package is less than 68.5g

Step-by-step explanation:

To solve this question, we use the normal probability distribution and the central limit theorem.

Normal Probability Distribution:

Problems of normal distributions can be solved using the z-score formula.

In a set with mean \mu and standard deviation \sigma, the zscore of a measure X is given by:

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

The Z-score measures how many standard deviations the measure is from the mean. After finding the Z-score, we look at the z-score table and find the p-value associated with this z-score. This p-value is the probability that the value of the measure is smaller than X, that is, the percentile of X. Subtracting 1 by the pvalue, we get the probability that the value of the measure is greater than X.

Central Limit Theorem

The Central Limit Theorem estabilishes that, for a normally distributed random variable X, with mean \mu and standard deviation \sigma, the sampling distribution of the sample means with size n can be approximated to a normal distribution with mean \mu and standard deviation s = \frac{\sigma}{\sqrt{n}}.

For a skewed variable, the Central Limit Theorem can also be applied, as long as n is at least 30.

Mean weight of 67g and a sample standard deviation of 1g.

This means that \mu = 67, \sigma = 1

Sample of 4

This means that n = 4, s = \frac{1}{\sqrt{4}} = 0.5

What is the probability that the mean weight of 4 eggs in a package is less than 68.5g?

This is the pvalue of Z when X = 68.5. So

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

By the Central Limit Theorem

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

Z = \frac{68.5 - 67}{0.5}

Z = 3

Z = 3 has a pvalue of 0.9987

0.9987 = 99.87% probability that the mean weight of 4 eggs in a package is less than 68.5g

6 0
3 years ago
Read 2 more answers
5 - 2(x+6) = 14 <br> Solve for x please help
LenKa [72]
5-2(x+6)=145-2x-12=14
-7-2x=14
-2x=21
-10.5
8 0
3 years ago
The product of -9 and 2, added to 9
I am Lyosha [343]
-9 + 2 = 7

7 + 9 = 16

X = 16
7 0
3 years ago
Read 2 more answers
An oil drilling company is drilling a hole. The elevation of the bottom of the hole changes by feet each day. After a certain nu
marin [14]

Answer:

option.D

Step-by-step explanation:

  • each day it changes by -73\frac{1}{4}
  • so for two days , the elevation becomes  -73\frac{1}{4} +  -73\frac{1}{4}
  • for 3 days :  -73\frac{1}{4} +  -73\frac{1}{4} +  -73\frac{1}{4}
  • so, for n days,  -73\frac{1}{4} + ........ n times

=  n*-73\frac{1}{4}

  • therefore, for x days, elevation = x*-73\frac{1}{4}
  • as it is given that after certain days this elevation has reached -366\frac{1}{4}
  • so, x*-73\frac{1}{4} = -366\frac{1}{4}
3 0
3 years ago
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