00:02
Okay, we are going to find the automobile production, the number in of cars produced at a certain factory in one day after t hours of operation is given by n to the t equals 100 t minus 5t squared.
00:24
0 is less than or equal to t less than equal to 10.
00:31
If the cost c in dollars of producing n cars is c to the n equals 15 ,000 plus 8 ,000 n.
00:40
Find the cost.
00:41
So basically, what we're doing is a substitution property where all we really need to do is take this equation and substitute it in for in and then we can plug in however many hours we need for t and solve okay so if we do substitution i'm just going to go ahead and plug it right here and do 100 t minus 5 t squared and and let's go ahead and multiply that out.
01:43
So my new equation is 15 ,000 plus the 8 ,000 plus 100 t would be 8 ,1, 2, 3.
02:11
And i got to add two more zeros, 4, 5, t, because i'm distributing that in.
02:23
Now i've got to distribute it over to here...