Final answer:
Trisha will prepare 35 kilograms of dough if she works for 7 hours.
Step-by-step explanation:
To solve this problem using unit rates, we need to find the rate at which Trisha prepares dough. We know that she prepared 10 kilograms of dough after working for 2 hours. So, her rate of preparation is 10 kilograms / 2 hours = 5 kilograms per hour. Now, we can use this unit rate to find out how much dough Trisha will prepare if she works for 7 hours. To do this, we multiply the unit rate by the number of hours she will work: 5 kilograms per hour × 7 hours = 35 kilograms of dough.