Answer:
The lengths from 32.1cm to 46.5cm covers 99.7% of this distribution.
Step-by-step explanation:
The 68-95-99.7 rule states that, for normally distributed measures:
68% of the values are within 1 standard deviation of the mean.
95% of the values are within 2 standard deviations of the mean.
99.7% of the values are within 3 standard deviations of the mean.
(a) What range of lengths covers almost all, 99.7%, of this distribution?
Those are those values within 3 standard deviations of the mean. So
From A to B, in which
![A = \mu - 3\sigma = 39.3 - 3(2.4) = 32.1](https://tex.z-dn.net/?f=A%20%3D%20%5Cmu%20-%203%5Csigma%20%3D%2039.3%20-%203%282.4%29%20%3D%2032.1)
![A = \mu + 3\sigma = 39.3 + 3(2.4) = 46.5](https://tex.z-dn.net/?f=A%20%3D%20%5Cmu%20%2B%203%5Csigma%20%3D%2039.3%20%2B%203%282.4%29%20%3D%2046.5)
The lengths from 32.1cm to 46.5cm covers 99.7% of this distribution.
Answer:
<u>The correct answer is D. 2.11</u>
Correct statement and question:
What is the simplified value of the expression below rounded to the nearest hundredth?
(3.5x2+9)/(10.4-1.4x2)
Source: Previous question that can be found at brainly
Step-by-step explanation:
Let's solve and simplify, this way:
(3.5 x 2 + 9)/(10.4 - 1.4 x 2)
=(7 + 9)/(10.4 - 2.8)
= 16/7.6
= 2.11 (Rounding to the next hundredth)
<u>The correct answer is D. 2.11</u>
Answer:
hey
Step-by-step explanation:
Complete question:
A store sells packages of batteries. The package with the best deal has the highest ratio of number of batteries to total cost.
Packages of Batteries
Number of Batteries
Total Cost
3
$8
5
$8
12
$24
14
$24
Which package offers the best deal?
3 for $8
5 for $8
12 for $24
14 for $24
Answer:
5 for $8
Step-by-step explanation:
Given:
3 batteries sell for $8
5 batteries sell for $8
12 batteries sell for $24
14 batteries sell for $24
To find the package that offers the best deal, find the cost of each battery by dividing each total cost by the number of the batteries. The package with the lowest will be the best package.
Thus:
Package 1: ![\frac{8}{3} = 2.67](https://tex.z-dn.net/?f=%20%5Cfrac%7B8%7D%7B3%7D%20%3D%202.67%20)
Package 2: ![\frac{8}{5} = 1.60](https://tex.z-dn.net/?f=%20%5Cfrac%7B8%7D%7B5%7D%20%3D%201.60%20)
Package 3: ![\frac{24}{12} = 2.00](https://tex.z-dn.net/?f=%20%5Cfrac%7B24%7D%7B12%7D%20%3D%202.00%20)
Package 1: ![\frac{24}{14} = 1.71](https://tex.z-dn.net/?f=%20%5Cfrac%7B24%7D%7B14%7D%20%3D%201.71%20)
The best package here is package 2 where 5 batteries sell for $8, because the cost of each battery here is significantly lower than the cost of each battery in other packages.
Answer:
Im pretty sure the answer is 6
Step-by-step explanation:
Leave the 24 aside for a sec. Focus on the 6÷2 and 4÷2. 6 divided by 2 is 3. And 4 divided by 2 is 2. So now its 24÷3= 8
8-2=6