00:04
So in this problem, tely statement accounts earn about 5 % common interest, and there's a contribution of 1 ,200 per year being made for about 20 years.
00:24
So your differential equation, your d -e, be given as d -y -d -t, d -y -d -x, which is equal to 5 -1 -100 times y plus 1 ,200.
00:55
And y of zero is 1200, where zero is less than or equal to t and t is less than or equal to 20.
01:33
Now for john, for john, his saving accounts earns about 5 % common interest and there's a contribution of 2 ,400 per year being made for over 10 years.
02:01
But after the 10th year, since the start of kelly's account, the differential equations will be d .y, dx, is equal to 5 over 100 times y plus 2400.
02:50
So y of 10 will be equal to 2400, 10, less than or equal to t, and c less than that equal to.
03:12
So we have two differential equations, and you could say, and we have to solve them...