Answer:
3 workers
Step-by-step explanation:
It is given that Clara is opening a room cleaning business on the campus. For Clara, there are 5 potential workers.
The daily wage of for the worker are :
Alex ---
![\$ 110](https://img.qammunity.org/2022/formulas/business/college/p7amnyrgj7wpzcdaqooka84683wedghv0k.png)
Diane --
![\$ 130](https://img.qammunity.org/2022/formulas/business/college/mrasvbm1q53f6aqln2vuufy9f1wwttv2oj.png)
Cedric --
![\$ 150](https://img.qammunity.org/2022/formulas/business/college/gbojo0qiakjwmcktjpgkgkej0zgh3rh1li.png)
Peter --
![\$ 170](https://img.qammunity.org/2022/formulas/business/college/1i2fuqb9a3f7c279jhchdmgio2zo8umts3.png)
Zekta --
![\$ 190](https://img.qammunity.org/2022/formulas/business/college/afquyznp10wi8hmgoqk0gc4mnk7iybkk0d.png)
Each of the worker will clean 8 rooms and $ 21 will be charged for each room to be cleaned.
Therefore, the number of the workers required is :
The marginal revenue product for each worker = 21 x 8 = 168
So, Clara will hire only those workers who have daily wage less than $ 168.
Therefore, Clara will hire 3 workers, namely Alex, Diane and Cedric.