+586 Billy is making compost. To create good compost quickly, the ingredient mixture should have a C:N ratio near 30:1 The table below shows the carbon and nitrogen percentages (by weight) of various common compostables.
After mixing a pound of coffee grounds and 6 pounds of rotten vegetables, how many pounds of dry leaves should he add to obtain a 30:1 C:N ratio? Express your answer rounded to the nearest pound.
