This is because when fractions are multiplied both their numerators and denominators are multiplied
We need to set up an equation to solve this problem. The sales tax is a percentage of the total, so that's what we are looking for.
Let's call S our sales tax
![420\times S](https://tex.z-dn.net/?f=420%5Ctimes%20S)
So, that's what we are looking for, and we are given the actual sales tax
![420\times S = 16\\S = 16\div420\\S= .0380](https://tex.z-dn.net/?f=420%5Ctimes%20S%20%3D%2016%5C%5CS%20%3D%2016%5Cdiv420%5C%5CS%3D%20.0380)
So now we have a decimal. In order to convert a decimal into a percentage, we must multiply by 100 (since percentages are out of 100)
![.0380\times100=3.8\%](https://tex.z-dn.net/?f=.0380%5Ctimes100%3D3.8%5C%25)
The sales tax rate is 3.8%
Answer: she waters 4 plants
Step-by-step explanation:
5cups /quart=20/x(x=#of quarts)
5x=20
x=20/5
x=4
Circumference
2*pi*r
2*(22/7)*(9/2)
2*(11/7)*9
198 / 7
28.28 cm
so 56.52 is not correct