Answer:

Step-by-step explanation:
1st you want to find a common denominator. which is 8.
2nd change
to 
3rd you add
and
together an you get 
Answer:
B
Step-by-step explanation:
r^2 is 0.9997, and after 10 years it'll be 95660
Is this for real? Lol anyways I’m guessing B
Area of the wall = 8 x 19 = 152 ft square
Area of the window = 4 x 5 = 20 ft square
Area of 3 windows = 20 x 3 = 60 ft square
The percent area of 3 windows from area of the wall = 60/152 or approximately .395 or 39.5%