13, 24, 35, 46, 57, 68, 79.
Всего нефти 30 * 16 1/2=495 т
1 день 495*30/100=148 1/2 т
осталось нефти 495-148 1/2 = 346 1/2
2 день 346 1/2 *80/100=2771/5
осталось 69 3/10
1. were
2. doesnt play
3. wrote
4.do do
5. did feed
408 сотен = 408 * 100 = 40800
40800, 40820, 40850.