You need to multiple 7 and 5 or you could just skip the answer
Well first of this makes sense because you need to make sure your rug will fit. So anyways, first lay your rug out on a flat surface, grab your yardstick, lay it on the rug to find the length and then the width. you then know the size of your rug(assuming its square). You can do the same thing in the room you want it in.
Answer:
A)2100 ml
Step-by-step explanation:
Given total vinegar is 3 1/2 liters and the used vinegar is 3/5 of the vinegar in the beaker:
#First calculate the amount of vinegar not poured in the beaker:
![V_o=V_t-V_b\\\\=3\frac{1}{2}(1-\frac{2}{3})\\\\=1\frac{1}{6}](https://tex.z-dn.net/?f=V_o%3DV_t-V_b%5C%5C%5C%5C%3D3%5Cfrac%7B1%7D%7B2%7D%281-%5Cfrac%7B2%7D%7B3%7D%29%5C%5C%5C%5C%3D1%5Cfrac%7B1%7D%7B6%7D)
#Calculate amount of vinegar used in experiment:
![V_b=\frac{2}{3}V_t=\frac{2}{3}(3\frac{1}{2})=2\frac{1}{3}\\\\V_u=\frac{3}{5}V_b=\frac{3}{5}\times 2\frac{1}{3}=1\frac{2}{5}](https://tex.z-dn.net/?f=V_b%3D%5Cfrac%7B2%7D%7B3%7DV_t%3D%5Cfrac%7B2%7D%7B3%7D%283%5Cfrac%7B1%7D%7B2%7D%29%3D2%5Cfrac%7B1%7D%7B3%7D%5C%5C%5C%5CV_u%3D%5Cfrac%7B3%7D%7B5%7DV_b%3D%5Cfrac%7B3%7D%7B5%7D%5Ctimes%202%5Cfrac%7B1%7D%7B3%7D%3D1%5Cfrac%7B2%7D%7B5%7D)
#The unused vinegar is therefore calculated by subtracting the used vinegar from the total at the start of the experiment:
![V_r=V_t-V_u\\\\=3\frac{1}{2}-1\frac{2}5}\\\\=2\frac{1}{10}\times 1000\ ml\\\\=2100\ ml](https://tex.z-dn.net/?f=V_r%3DV_t-V_u%5C%5C%5C%5C%3D3%5Cfrac%7B1%7D%7B2%7D-1%5Cfrac%7B2%7D5%7D%5C%5C%5C%5C%3D2%5Cfrac%7B1%7D%7B10%7D%5Ctimes%201000%5C%20ml%5C%5C%5C%5C%3D2100%5C%20ml)
Hence, the unused vinegar is 2100 ml