Final answer:
Tiana prepared 42 kilograms of dough if she worked for 6 hours.
Step-by-step explanation:
To find out how much dough Tiana prepared when she worked for 6 hours, we can use the concept of ratios. We know that Tiana prepared 28 kilograms of dough in 4 hours.
So, the ratio of dough to hours is 28 kg : 4 hours = 7 kg/h.
If Tiana worked for 6 hours, we can multiply the ratio by the number of hours: 7 kg/h x 6 hours = 42 kg.
Therefore, Tiana prepared 42 kilograms of dough if she worked for 6 hours.