HELP!! MEDAL!!
Write the answer to the problem below, using the correct number of significant figures.
27.4 x 5.205=
A)143
b)140
c) 142.6
d) 142.62

Question

clamin · Answer

im confuse between c or d

tommynaut · Answer

The first step is to realise how many significant figures you need; if it's not given, then it would be the largest amount of significant figures you have in your question.
For example, 1.2 has 2 signficant figures, 1.23 has 3, so if you did 1.2 x 1.23, you would need to have your answer in 3 significant figures.
So, how many significant figures would you need in this situation?

clamin · Answer

3

tommynaut · Answer

You have 27.4 x 5.205
27.4 has how many significant figures? 3
5.205 has how many significant figures? 4
You pick the larger amount of significant figures. (4)

So we pick the answer with 4 significant figures, which is what?