Ihave to wake up at 5am and it’s 11pm can someone me with this so i can go to bed

the 11th week.

Step-by-step explanation:

the expression for the markdown on the 8th week is p-.15p=.85p since it will get marked down 15% on the 8th week. the expression for the additional markdowns is p-.05p=.95p since it will get marked down an additional 5% every week after the 8th week.

On the 8th week it will be marked down to .85(150) = 126.50.

9th week: .95(127.50) = 121.13

10th week: .95(121.13) = 115.07

11th week: .95(115.07) = 109.32    

109 is under 110 therefore it is the 11th week.