00:01
In this problem, we're given the distance from earth to pluto.
00:03
We see that as 4 .58 times 10 to the 9th kilometers.
00:07
Radio singles, signals, go at a speed of light of 3 times 10 to the 5th per second, kilometers per second.
00:14
So we're trying to figure out how long it's going to take for it to reach earth.
00:17
So what we're going to be using here is the fact that distance is equal to rate times time.
00:21
So to figure out the time it's going to take, we're going to do distance divided by the rate, and that's going to give us our time.
00:27
So what we want to do is divide the distance, which is the 4 .58 times 10 to the 9th, and we're going to divide that by the 3 .0 .0 times 10 to the 5th.
00:42
So to start with this, we're going to do just regular division with the 4 .58 and the 3.
00:49
So 4 .58 divided by 3 is 1 .5 to 6, and that repeats forever and ever.
00:56
So let's go ahead and just say 0 .6 repeating for now.
01:00
And then for the tens, we're going to use the quotient rule...