How can you tell if a number is divisible by 3?
a. the sum of the digits of the number is a multiple of 3.
b. the first two digits are divisible by 3.
c. the last number is 3.
d. the number ends in an odd digit.

Abilliard ball is struck by a cue. it travels 1 0 0 cm 100cm before ricocheting off a rail and traveling another 1 2 0 cm 120cm into a corner pocket. the angle between the path as the ball approaches the rail and the path after it strikes the rail is 4 5 ∘ 45 ∘ . how far is the corner pocket from where the cue initially struck the ball? do not round during your calculations. round your final answer to the nearest centimeter.