Answer:
the answer is 7/12 hours
Step-by-step explanation:
The decimal representation of any number is a linear combination of powers of 10. In other words, given a number like 123.456, we can expand it as
![1\cdot10^2+2\cdot10^1+3\cdot10^0+4\cdot10^{-1}+5\cdot10^{-2}+6\cdot10^{-3}](https://tex.z-dn.net/?f=1%5Ccdot10%5E2%2B2%5Ccdot10%5E1%2B3%5Ccdot10%5E0%2B4%5Ccdot10%5E%7B-1%7D%2B5%5Ccdot10%5E%7B-2%7D%2B6%5Ccdot10%5E%7B-3%7D)
for any
, so the above is the same as
![100+20+3+\dfrac4{10}+\dfrac5{100}+\dfrac6{1000}=\dfrac{100000+20000+3000+400+50+6}{1000}=\dfrac{123456}{1000}](https://tex.z-dn.net/?f=100%2B20%2B3%2B%5Cdfrac4%7B10%7D%2B%5Cdfrac5%7B100%7D%2B%5Cdfrac6%7B1000%7D%3D%5Cdfrac%7B100000%2B20000%2B3000%2B400%2B50%2B6%7D%7B1000%7D%3D%5Cdfrac%7B123456%7D%7B1000%7D)
Similarly, we can write
![0.768=\dfrac{768}{1000}](https://tex.z-dn.net/?f=0.768%3D%5Cdfrac%7B768%7D%7B1000%7D)
Now it's a question of reducing the fraction as much as possible. We have
so
![\dfrac{768}{1000}=\dfrac{96\cdot8}{125\cdot8}=\dfrac{96}{125}](https://tex.z-dn.net/?f=%5Cdfrac%7B768%7D%7B1000%7D%3D%5Cdfrac%7B96%5Ccdot8%7D%7B125%5Ccdot8%7D%3D%5Cdfrac%7B96%7D%7B125%7D)
Answer:
15.13
Step-by-step explanation:
To find diameter, divide circumference by pi or 3.14
I'm going to change the fraction to a decimal, so 47.5
47.5/3.14 = 15.1273885
Round to nearest hundredth gives you 15.13
The thousands are 827 after nine