3 + 0.3 + 0.03 + 0.09 should be your answer
Answer:

Step-by-step explanation:
Given


Required
Determine the total length
Since, he ribbons are of the same lengths.
The total length is calculated as:




Answer: -30
Step-by-step explanation:
-240 / 8
= -30
I think you mean how many thousands equal 20 hundreds. Well it's simple, 20 hundreds equal 20*100 which equals 2,000. Therefore, 20 hundreds equals 2 thousands.
Given the expression 
Take a logarithm
from both side of the given expression:

From the property
you have that

Then

Answer: correct choice is C