Morgan uses 2 oz of dog shampoo to bathe her dog each week. After 4 wk, 34 oz of shampoo remains.

What is the total number of weeks that Morgan can use this shampoo before the bottle is empty?

? wk

The amount of shampoo required by Morgan each week to bathe her dog = 2 oz

So

The amount of shampoo required by Morgan in 7 days to bathe her dog = 2 oz

The amount of shampoo remaining after 4 weeks = 34 oz

So the amount of shampoo remaining after (4 * 7) days = 34 oz

The amount of shampoo remaining after 28 days = 34 oz

The amount of shampoo that Morgan uses in 28 days = (2/7) * 28 oz

= 2 * 4 oz

= 8 oz

Then

8 oz of shampoo is required by Morgan in = 28 days

Then

34 oz of shampoo will be used in = (28/8) * 34 days

= 7 * 17 days

= 119 days

So

The total number of

days before the bottle becomes empty = 119 + 8 oz

= 127 days