Step-by-step explanation:
![n = 3 \times 5 {}^{2} \times {x}^{3}](https://tex.z-dn.net/?f=n%20%3D%203%20%5Ctimes%205%20%7B%7D%5E%7B2%7D%20%20%20%5Ctimes%20%20%7Bx%7D%5E%7B3%7D%20)
Square both sides of the equation.
![{n}^{2} = (3 {}^{2} \times 5 {}^{4} \times {x}^{6} )](https://tex.z-dn.net/?f=%7Bn%7D%5E%7B2%7D%20%20%3D%20%283%20%7B%7D%5E%7B2%7D%20%20%5Ctimes%205%20%7B%7D%5E%7B4%7D%20%20%5Ctimes%20%20%7Bx%7D%5E%7B6%7D%20%29)
![5 {n}^{2} = 5(3 {}^{2} \times {5}^{4} \times {x}^{6} )](https://tex.z-dn.net/?f=5%20%7Bn%7D%5E%7B2%7D%20%20%3D%205%283%20%7B%7D%5E%7B2%7D%20%20%5Ctimes%20%20%7B5%7D%5E%7B4%7D%20%20%5Ctimes%20%20%7Bx%7D%5E%7B6%7D%20%29)
If Ian uses 1/20 of the ketchup 4 times, this is equal to 4/20, or
![\frac{4}{20}](https://tex.z-dn.net/?f=%20%5Cfrac%7B4%7D%7B20%7D%20)
.
![\frac{4}{20}](https://tex.z-dn.net/?f=%20%5Cfrac%7B4%7D%7B20%7D%20)
can be simplified to
![\frac{1}{5}](https://tex.z-dn.net/?f=%20%5Cfrac%7B1%7D%7B5%7D%20)
, which means we need to work out
![\frac{1}{5}](https://tex.z-dn.net/?f=%20%5Cfrac%7B1%7D%7B5%7D%20)
of 12.2
![\frac{1}{5}](https://tex.z-dn.net/?f=%20%5Cfrac%7B1%7D%7B5%7D%20)
is equivalent to 20%, which as a decimal is 0.2
0.2 x 12.2 = 2.44 - however, this is how much he has
used, and we need to figure out how much is left.
12.2 - 2.44 = 9.76
So, Ian has 9.76 oz remaining :)
Answer:
$75.6
Step-by-step explanation:
Multiply the model car's price by 105% (or 1.05) to find the total price.
$72 * 105% = $75.6.
B. 90/360, because this is 1/4 from circle. It's even shown in the picture.
Example: If you take a protractor at 180°, then if you mirror it, then 360° will comeout, i.e. a circle.