Answer: disregard my previous answer, it was incorrect, looking for right one right now
(you can delete this if you want)
Answer:
The old price was 36 cents.
The new price is 45 cents.
Answer:
The quantity of the mark is $11.20
Step-by-step explanation:
Given that:
Amount paid by store for cell phone = $56
The store marks the price at 20%.
Quantity of the mark = 20% of 56
Quantity of the mark = 
Quantity of the mark = 0.2 * 56
Quantity of the mark = $11.20
Hence,
The quantity of the mark is $11.20
Answer:
There was a 5% increase in Stacia's height from her 12th birthday to her 13th birthday.