Answer:
Step-by-step explanation:
The formula of a volume of rectangular prism:
<em>l</em><em> - length</em>
<em>w</em><em> - width</em>
<em>h</em><em> - height</em>
<em />
We have
Substitute:
800,000 people
x = -2.9
y = 2.6
x+y = -2.9+2.6
= -0.3