Arecipe calls for 3 teaspoons of salt for every 5 cups of flour. if you wanted to make a larger batch with 15 cups of flour, how much salt would you need? a. 5 teaspoons b. 10 teaspoons c. 9 teaspoons d. 6 teaspoons

Given:
3 teaspoons of salt for every 5 cups of flour.

How much salt is needed for 15 cups of flour?

This is a proportion problem:
a/b = c/d where ad = bc

3/5 = x/15
3*15 = 5x
45 = 5x
45/5 = x
9 = x

C. 9 teaspoons of salt is needed for 15 cups of flour.

3/5 = 9/15
3*15 = 5*9
45 = 45