First you need to find how much is left in the container by finding the whole volume. cylinder volume= πr²h where r is the radius and h is hight V= (3.14)*(5²)*(10) V=(31.4)(25) V=785cm³ is the total volume now half has been used so divide that number in half 785/2= 392.5cm³ now she uses 4cm³ a day so divide 392.5/4= 98.125 round to the nearest whole number answer is B 98
