it would depend how much you actually used, but you would take the amount you used and divide it by the total amount of yarn. so if the yarn was 4m long and you used 2m then it would be 2/4 which is 0.5 which is also 50%, so half the yarn was used.
Consider the expression ![(8.1\cdot 10^{-4})^2.](https://tex.z-dn.net/?f=%288.1%5Ccdot%2010%5E%7B-4%7D%29%5E2.)
Use main properties for powers:
1. ![(a\cdot b)^m=a^m\cdot b^m;](https://tex.z-dn.net/?f=%28a%5Ccdot%20b%29%5Em%3Da%5Em%5Ccdot%20b%5Em%3B)
2. ![(a^m)^n=a^{m\cdot n};](https://tex.z-dn.net/?f=%28a%5Em%29%5En%3Da%5E%7Bm%5Ccdot%20n%7D%3B)
3. ![a^m\cdot a^n=a^{m+n}.](https://tex.z-dn.net/?f=a%5Em%5Ccdot%20a%5En%3Da%5E%7Bm%2Bn%7D.)
Then
![(8.1\cdot 10^{-4})^2=8.1^2\cdot (10^{-4})^2=65.61\cdot 10^{-4\cdot 2}=65.61\cdot 10^{-8}=6,561\cdot 10^{-2}\cdot 10^{-8}=6,561\cdot 10^{-10}.](https://tex.z-dn.net/?f=%288.1%5Ccdot%2010%5E%7B-4%7D%29%5E2%3D8.1%5E2%5Ccdot%20%2810%5E%7B-4%7D%29%5E2%3D65.61%5Ccdot%2010%5E%7B-4%5Ccdot%202%7D%3D65.61%5Ccdot%2010%5E%7B-8%7D%3D6%2C561%5Ccdot%2010%5E%7B-2%7D%5Ccdot%2010%5E%7B-8%7D%3D6%2C561%5Ccdot%2010%5E%7B-10%7D.)
The result in scientific notation is ![6,561\cdot 10^{-10}.](https://tex.z-dn.net/?f=6%2C561%5Ccdot%2010%5E%7B-10%7D.)
The result as a decimal is ![0.0000006561.](https://tex.z-dn.net/?f=0.0000006561.)
Answer:
44,280
Step-by-step explanation:
I might know. I multiplied the 1st and got 307.5.
then multiplied the 2d. I got 144
multiplied 307.5x144 and I got 44,280
Answer:
6. 4
7. 40
8. 10
9. 4
10. 21
Step-by-step explanation:
The constant of proportionality is 3.50 since gummy worms are sold at the same rate per pound.
3.50x, equation
3.50(2.5) = $8.75 for 2.5 pounds