00:01
In this problem, we're going to use the formula m of r equals 5, log of r minus 5.
00:20
And we're given m of r is a negative 1 .41.
00:33
So i'm looking for r, which is in parsec.
00:43
All right, so plugging in negative 1 .41, we need to do this using order of operations, solving linear equations.
00:58
I'm going to add the 5 first, getting the log by itself.
01:05
So that gives me 3 .59 equals 5 times log r.
01:15
And that 5 is understood multiplied, so we're going to divide it to both sides.
01:31
And that gives me 0 .718.
01:36
If that did not become a terminating decimal, then i would have left it alone and dealt with it later...