Density = Mass / Volume = 2000/0.5
Density = 4000 Kg/m^3
Answer:
angles in linear pair are 90° hope it helps u ♥♥♥♥♥♥♥
So we start off with what 4 numbers added together equal 32.
first truck 5 tons
second truck 7 tons
third truck 9 tons
and fourth truck 11.

5+7= 12 +9 = 21+11= 32.
Im not good in math and this is my first question, my best guess is D
I will investigate tommorow this problem a little bit more... <3