A vessel is in the shape of an inverted cone. The radius of the top is 5 cm and the height is 9 cm. Water is poured in to a height of r cm. (A) Find an expression for the volume V of the water in the vessel in terms of . Expressions like 7 should be enter as 7 * 2 with the multiplication operation between terms. sin (a) OO ? 25 T . X 3 243 si (B) Use linear approximation to estimate the increased in V when the depth of water a increases from 4 cm to 4. ab sin (a) ? 1.24 (C) Estimate the percentage change in the volume of the water using the estimation in Part (B)