(85 + 60) ÷ 2 = 72.5 Close to 71%
Answer: D - 71%
Answer:

Step-by-step explanation:
a)
![[ \ where \ k \ is \ a \ constant \ ]](https://tex.z-dn.net/?f=%5B%20%5C%20where%20%5C%20k%20%5C%20is%20%5C%20a%20%5C%20constant%20%5C%20%5D)
<em><u>Find k.</u></em>
Given x = 12, y = 5,

b)
<em><u>Find x.</u></em>
Given y = 10
We have k = 300

c)
<u><em>Find y</em></u>
Given x = 3
We have k = 300

The answer is 28.09 g. I hope this helped.