# Homework Help: 2 significant figure problems

1. Aug 26, 2008

1. The problem statement, all variables and given/known data

Question 1.
Find the sum of the measurements 896 g, 55.2 g, 0.63 g, and 3.5 g.

Question 2.
How many significant figures are in the measurement 60,000,000 km/s?

2. Relevant equations

3. The attempt at a solution

Attempt on #1: 955.33 g (wrong ans)
Attempt on #2: 2 sigfigs (wrong ans)
1. The problem statement, all variables and given/known data

2. Relevant equations

3. The attempt at a solution

Last edited: Aug 26, 2008
2. Aug 26, 2008

### LowlyPion

The first question is asking for grams not km/s
In the second question is a trailing 0 considered significant?

3. Aug 26, 2008

Yeah, the km/s was a typo, i was looking at #2's units when I was typing.

4. Aug 27, 2008

### Redbelly98

Staff Emeritus
You did the math correctly. What do the significant figure rules say for addition/subtraction?

5. Aug 28, 2008

### Banaticus

I only see two numbers right there. Does that help?

6. Aug 28, 2008