Answer:
The density of cube is 6.17959 
Step-by-step explanation:
The density is given by ration of a mass of body and volume occupied by a body.

Where,
is density.
m is mass of a body
V is the volume of a body
Given that one side of the cube is 0.53cm
Hence, the volume of a body is V=
=0.148877
Now, the Density of the cube will be



Thus, The density of cube is 6.17959 
Decigrams are 100 times bigger than milligrams, so convert 8 decigrams to 800 milligrams. Than subract: 800-3= 797
The flea weighs 797 milligrams more than the ant.
Answer:
36,054,454,352
Step-by-step explanation:
35,841,602,520 + 212,851,832 = 36,054,454,352
Hope that fills your boredom a bit.