Question

Evaluate the logarithm to four decimal places: log9 123

Answer 1

well, there probably isn't a log(base 9) button on your calculator, so use the conversion formula to ln

Answer 2

there is

Answer 3

a LOG button on my calculator. Im using my phone. So I hit LOG(9) then what?

Answer 4

117.371

Answer 5

??

Answer 6

um... I think that's log(base 10) that's what the button on the calc is

Answer 7

the LOG button on a calculator always does base 10 by default

Answer 8

ohhh okay. So is it better to use the LN?

Answer 9

you can get around that with a conversion formula just do LOG(123)/LOG(9) or you can do LN(123)/LN(9) the rule is log(the number)/log(the base)

Answer 10

amazingly you will get the same answer either way!

Answer 11

ohhh I see perfect. I remember him saying that in class.

Answer 12

so something like 2.19...... of course round it to however many dec you need

Answer 13

2.190 is this what you got?

Answer 14

haha perfect!

Answer 15

needs more decimal places so 2.1972

Answer 16

I think the phone calculators have rounding errors sometimes

Answer 17

I have to check out, but good luck!

Answer 18

take care!

Answer 19

Awesome, you are making me feel like I might pass this test!!