What’s the answer to 11 whoever explains gets brainlest

Product =a*b is the same as product =b*a,
for example
5*2=10, 2*5=10

If you need an equation, it would be y=2x+8, y would be how long it grew, x being weeks.if you need how long he was asleep, it would be 4 weeks if he started with no beard, the equation would be x=8÷2if he did have a beard before hand, the equation would be 2w+x=8