B because
Solve for the first variable in one of the equations, then substitute the result into the other equation.
8 X
----- = ------
20 40000
40000/20=2000
2000*8=16000
X=16000
Answer:
Just count the number of zeros:
Step-by-step explanation:
There are 4 zeros, so the answer is 5 x 10^4.
Answer:
1:3
Step-by-step explanation:
That ratio would be 5 :15 or 1:3