C is 2020 bdecuase I want points
<span> 32x4 - 12x2 + 7x
-------------------
2x</span>
It's 10 - 4
moving decimal over to the right makes a negative exponent.
ANSWER
6.4 hours
EXPLANATION
if it takes 10 hours to get 50%, then it will take less number of hours to get 32%
We use proportion to solve this question.
If less more divides.
The number of hours it will take to get 32% is


Hence it will take 6.4 hours to get 32%