This can be solved by finding their point of intersection on the graph, which is at point (1,3).
Conversion from gallons to quarts
1 gallon = 4 quarts
Now,
Angela has

gallons =

= 10 quarts of blue paint
Ryou has 1/2 of what Angela has = 1/2*10 = 5 quarts of white paint.
Each wall requires

of paint.
After coloring;
Blue colored walls = (10)/(

) = 3 walls with 7/11 quarts of paint remaining.
White colored walls = (5)/(

) = 1 wall with 9/11 quarts of paint remaining
Answer:
4.243
step by step explanation:
A = 28000(0.9275)^5
a = 19219
$19,219 is the answer
Hoped this helped