It depends on the question, but if the question is, how many is there....
It usually means to <u><em>add</em></u>
(What is the question anyway?)
Answer:
4 hours to pay the same amount
and aif you want a 3 hours work you should get carpenter A
Step-by-step explanation:

carpenter A for 3 hours:

carpenter B for 3 hours:

Answer:
I believe the answer is about 34
Step-by-step explanation:
Answer:
a balance and a beaker of water
hope it helps mark as brainliest