Answer: N/A
Step-by-step explanation: To determine who worked more hours, we need to know the hourly rate for both Zainab and Keziah. Without this information, it is impossible to accurately determine who worked more hours based on the total earnings of $231.
Here's an example to illustrate this:
Let's say Zainab earns $10 per hour and Keziah earns $15 per hour. We can use this information to calculate the hours each person worked.
Let's assume Zainab worked for "x" hours. Therefore, Zainab earned $10x.
Similarly, let's assume Keziah worked for "y" hours. Therefore, Keziah earned $15y.
According to the question, the total earnings for both Zainab and Keziah is $231. So, we can write an equation to represent this:
10x + 15y = 231
Unfortunately, without any additional information, we cannot solve this equation and determine the exact number of hours worked by each person. We would need to know the hourly rates for both Zainab and Keziah to accurately calculate the number of hours worked.