1=-8 l
4=100 l
7=? l
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Hey, im not really sure but i think it is that 1. x=96 y=11 2. x=16 y=15 3.x=81 y=18
Then you just substitute the numbers into the letters. For example,
11-96(2)= -181
15-16(2)= -17
18-81(2)= -144
Answer: 0.8137
Step-by-step explanation:
As per given , we have
![\mu= 17.2\ ,\ \sigma=2.5](https://tex.z-dn.net/?f=%5Cmu%3D%2017.2%5C%20%2C%5C%20%5Csigma%3D2.5)
Sample size : n= 47
Let
be the sample mean o.
Then, the probability that the mean of a sample of 47 families will be between 16.6 and 17.6 pounds will be :
![P(16.6](https://tex.z-dn.net/?f=P%2816.6%3Cx%3C17.6%29%3DP%28%5Cdfrac%7B16.6-17.2%7D%7B%5Cdfrac%7B2.5%7D%7B%5Csqrt%7B47%7D%7D%7D%3C%5Cdfrac%7B%5Coverline%7Bx%7D-%5Cmu%7D%7B%5Cdfrac%7B%5Csigma%7D%7B%5Csqrt%7Bn%7D%7D%7D%3C%5Cdfrac%7B17.6-17.2%7D%7B%5Cdfrac%7B2.5%7D%7B%5Csqrt%7B47%7D%7D%7D%29)
![=P(-1.645](https://tex.z-dn.net/?f=%3DP%28-1.645%3Cz%3C1.097%29)
[∵
]
![=P(z](https://tex.z-dn.net/?f=%3DP%28z%3C1.097%29-P%28z%3C-1.645%29%5C%5C%5C%5C%3DP%28z%3C1.097%29-%281-P%28z%3C1.645%29%29%5C%20%5C%20%5B%5Cbecause%5C%20P%28Z%3C-z%29%3D1-P%28Z%3Cz%29%5D)
[By using p-value calculator]
![=0.8636793-0.0499849=0.8136944\approx0.8137](https://tex.z-dn.net/?f=%3D0.8636793-0.0499849%3D0.8136944%5Capprox0.8137)
Hence, the probability that the mean of a sample of 47 families will be between 16.6 and 17.6 pounds= 0.8137
Answer:
$6000
Step-by-step explanation:
so basically, 25% of the 100% value is gone, right? which means that 75% of the value would remain. After that, all is easy. 8000*0.75, since 75% is 0.75, and the answer of that is 6000, so the current value is 6000 dollars.
Answer:
$2.25
Step-by-step explanation:
The first thing you do is multiply the prices of tickets by how many they bought.
$8.50 x 2= $17
$5.50 x 3= $16.50
You then add these two numbers together and subtract that from $40.25.
$17+$16.50=$33.50
$40.25-$33.50=$6.75
You then divide $6.75 by 3 to find the answer
$6.75/3=$2.25