# Homework Help: How to find this answer using logarithmic table?

1. Sep 25, 2016

### Dinesh321

[Mod Note: moved into homework forum, so template not present]

3/5840=0.00051

2. Sep 25, 2016

### BvU

What do you do to find the logarithm of a product ?
And what for the logarithm of a quotient ?

3. Sep 25, 2016

### micromass

What kind of logarithmic table do you have available?

4. Sep 25, 2016

### Dinesh321

I want to find quotient of 3 and 5840.

5. Sep 25, 2016

### micromass

We know.

6. Sep 25, 2016

### Dinesh321

I am using Logarithmic table (of 11th standard student).

7. Sep 25, 2016

### micromass

That doesn't tell us anything. Please describe the table or attach a picture.

8. Sep 25, 2016

### rcgldr

My guess is the table is similar to the one in the CRC series of books. It's a table of 900 logs (base 10) for values 0.100 to 0.999, to 4 decimal places. The CRC books explain how to use the log tables.

9. Sep 25, 2016

### Staff: Mentor

You need to convert all of the numbers involved into a form similar to scientific notation. For this problem, 3 = .3 * 101, so log(3) = log(.3 * 101) = log(.3) + log(101) = log(.3) + 1

To calculate the log of a product, use the fact that log(AB) = log(A) + log(B). To calculate the log of a quotient, use the fact that log(A/B) = log(A) - log(B).

10. Sep 25, 2016

### BvU

Thanks Mark for answering my question...... however, it was meant for Dinesh....

11. Sep 26, 2016

### symbolipoint

Old textbooks on Intermediate Algebra had good instructions for how to use log tables. Those would be the best way to learn this. Learning to use such tables will require some studying, maybe a couple of weeks if you are new to this; maybe a couple hours or so if you had done it previously. All the while, keep reminding yourself the meaning of LOGARITHM, base, and ANTI-LOG. Not telling you how. I'm just suggesting where to look.