Answer:

Step-by-step explanation:
Using the rule of exponents
=
, then
=
= 
Answer: [C]: "<span> 8x</span>⁷<span> + 3x</span>⁶<span> + x</span>⁵<span> + 5x</span>⁴<span> − 2x</span>³<span> </span>" .
__________________________________________________
4 people x 45 minutes = 180 minutes total to paint 5 walls
180/5 = 36 minutes of man work per wall
36 * 4 walls = 144 total minutes
144/6 people = 24 minutes total