Answer: Blake still has to mow 17,424 acres.
There are 43,560 square feet in an acre.
Blake has already mowed 60% of the lawn, leaving him 40% more to mow.
All we have to do is multiply 17,424 by 0.4 to find the number of square feet remaining.
43560 x 0.4 = 17424
Can you show us the number line model?
The formula of a volume of a sphere with radius R:
![V=\dfrac{4}{3}\pi R^3](https://tex.z-dn.net/?f=V%3D%5Cdfrac%7B4%7D%7B3%7D%5Cpi%20R%5E3)
We have R = 7cm. Substitute:
![V=\dfrac{4}{3}\pi\cdot7^3=\dfrac{4}{3}\pi\cdot343=\dfrac{1372\pi}{3}\ cm^3](https://tex.z-dn.net/?f=V%3D%5Cdfrac%7B4%7D%7B3%7D%5Cpi%5Ccdot7%5E3%3D%5Cdfrac%7B4%7D%7B3%7D%5Cpi%5Ccdot343%3D%5Cdfrac%7B1372%5Cpi%7D%7B3%7D%5C%20cm%5E3)
![\dfrac{1372\pi}{3}\approx1436.0\ cm^3](https://tex.z-dn.net/?f=%5Cdfrac%7B1372%5Cpi%7D%7B3%7D%5Capprox1436.0%5C%20cm%5E3)
<h3>Answer: V = 1436.0 cm³</h3>