He has a total of 7 Boards. he has 3 boards of his own and then you add the 4 additional boards that he has
Answer for the second question:
5*2 is 10
10 *2 is 20
20*2 is 40
40*2 is 80
80 *2 is 160
That's five hours
160*2 is 320
320*2 is 640
640*2 is 1280
1280*2 is 2560
The answer should be 2560
I forgot how to do it with the equation sorry
Answer:
will check if I can do thanks for points