A chocolate chip cookie recipe that produces 30 cookies calls for 2 1/4 cups of flour. If the math club decides to make fifteen dozen cookies for a bake sale, how many cup of flour will they need? (Source: Mandelbrot)

Respuesta :

13 1/2 is the answer. a dozen is 12 cookies and 15 x 12 = 180 and 180/30=6 6x2 1/4. =13 1/2