No. 4/3 or 4 divided by three is not the same as 3/4 or three fourths. 4/3 is 1.33333333333. 3/4 is .75
5.3×10^5=53×10^4
53×10^4+3.8×10^4
=56.8×10^4
=5.68×10^5. Hope it help!
The formula for the volume of a rectangular solid is V = L*W*H
Multiply out the length, width and height given: 40*10*5 = 400*5 = 2000
The volume is 2,000 cubic centimeters