To find the volume just multiply all the numbers together =5.5 * 6.5 * 8
Since 25% is smack in the middle between 20% and 30%, it will take equal volumes of ech to make a 25% solution.
Since 4 gallons of 30% solution was used, so 4 gallons of 20% solution will be needed.
The correct answer is "His teacher advised it because he did not have time to tutor Euler privately." I just did the assignment and got it correct.
we have


![(fog)(x)=[\frac{1}{x-13}]+7](https://tex.z-dn.net/?f=%28fog%29%28x%29%3D%5B%5Cfrac%7B1%7D%7Bx-13%7D%5D%2B7)
we know that
the denominator cannot be zero, therefore the value of x cannot be 
The domain are all real numbers except the number 
therefore
<u>the answer is the option</u>
{x|≠13}
1 is : d>-9
2 is: k ≥ -18
3 is: g>-1
4 is: n<-40
5 is: w ≤3
That should be correct.