Answer:240 strands of dough
Explanation:
You make a loaf of challah bread by braiding 6 strands of dough together. This means
1 loaf of challah bread requires braiding 6 strands of dough together. This is the unit rate for making challah bread.
The number of loaves of bread you can make with 40 strands of dough will be
1 loaf of challah bread requires braiding 6 strands of dough
x loaves of challah bread will require braiding 40 strands of dough
x = 40 × 6 = 240 strands of dough