# Math Help - power notation

1. ## power notation

write in power notation
i get the first one but stuck on second

1.)
log 5 625 =4
= 5^4 =625

2.)
log100000 =5
=?

2. Originally Posted by realistic
write in power notation
i get the first one but stuck on second

1.)
log 5 625 =4
= 5^4 =625

2.)
log100000 =5
=?
Look at all those zeros. And since the base is not given, I wonder what that means? Hint hint.

3. Originally Posted by realistic
write in power notation
i get the first one but stuck on second

1.)
log 5 625 =4
= 5^4 =625

2.)
log100000 =5
=?
What's the base of the logarithm in Q2?

4. since log x, unless otherwise specified, has a base of 10, then for log 100000=5, power notation is 10^5 = 100000

5. Originally Posted by jmedsy
since log x, unless otherwise specified, has a base of 10, then for log 100000=4, power notation is 10^5 = 100000
log100000 =4?

ok i c so if the base is not specified you assume it has a base of 10?

10^5 makes sense thanks

6. sorry i meant to type log 100000 = 5 there. yep