00:01
So in this question, we know that a car's value starts at 38 ,000.
00:06
You're trying to find this ratio b.
00:09
And we end up with a car's value being at 11 ,000.
00:14
So now what this ratio b is is this is the, if we find this number, we can find our full exponential formula to find the rate of exponential decay for this car's value.
00:24
So it starts in 2007 and it ends in 2013.
00:28
So this is a six -year time frame.
00:30
So now we're going to do 11 ,000 divided by 38, or just 11 divided by 38 ,000.
00:36
So this is the same as 11 divided by 38.
00:38
And we get a number that's about 0 .289...