# Simple Logarithmic Question

1. Aug 31, 2010

### mohabitar

I am unsure of how they were able to change 8.7 to 8 and make -2.3 to 2. Whats the explanation behind this?

2. Sep 1, 2010

### CRGreathouse

It's not that 8.7 was changed to 8, but that $$\lfloor8.7\rfloor$$ was changed to 8,since 8.7 rounded down is 8.

3. Sep 1, 2010

### Staff: Mentor

And $$\lceil -2.3 \rceil$$ is rounded up to -2.

4. Sep 1, 2010

### mohabitar

Ohhhh I didnt even notice those were the ceiling and floor functions, I thought they were just brackets! Thanks!