5) If f has a derivative at x=a, then f is continuous at x=a
A. Always rue
B. Always false
C. May be true
D. May be false

Emily convinced her mom to buy a giant box of her favorite cereal. her mom doesn't think the box will fit on their shelf. the volume of the box is 1000 cm^3 . the base of the box is 25 cm by 10 cm