Arecipe calls for 4 cups of flour. lauren wants to make 20% more servings than the recipe makes. which expression represents how many cups of flour lauren should use?

a.1/5*4
b.4/5*4
c.6/5*4
d.9/5*4

Afarmer has a large field that is x feet in length. he wants to fence in a rectangular section in the middle of the field , leaving a length of 100 feet of open field behind each end of the fenced rectangle.he also wants the width of the fenced-in space to be 100 feet less than its length. find the expressions to represent the length and width of the fenced section of the field