The muffin is 1.25 The bagel is 3.50 You get this by seeing the first person bought 3 muffins and 1 bagel. The second vought only 1 muffin less, so subtract the 2 totals and that gives you the difference which is the price of the muffin
Volume of the cone = 1/3π r^2 h So, we are given that r = 9 and h = 12 plugging in all the known values 1/3 * (3.14) * 9 * 9 * 12 = 1017.36 cm³ or ≈1017.4 cm³
