Answer:
First, determine the number of inches each contestant made by multiplying the fraction of layers by the height of each layer.
Next, determine what fraction of an hour each contestant took to make their fraction of layers by writing each number of minutes as a fraction of 60 minutes.
Last, determine each contestant’s unit rate in inches per hour.
So, Zeke's unit rate was of an inch per hour.
Melanie's unit rate was of an inch per hour.
To find out how much greater Zeke's unit rate was than Xavier's unit rate, subtract Xavier's unit rate from Zeke's unit rate.
Therefore, Zeke's unit rate was of an inch per hour greater than Xavier's unit rate.
Step-by-step explanation: