N=0 is the answer for this problem
Well, what are the pictures??
Area of the board divided by the time
2 x 3 = 6ft^2
15/6= 2.5mins
Don’t use that link!! They always comment under my stuff and other people have told me that’s just to get your information and location and stuff like that! Be safe and have a nice day
0.9 and 0.07
hope it helps