Which choice represents the simplified form of the expression below and the values of x for which it is defined?
√7x^3 divide by √x
a. x√2x when x> 0
b. x√7 when x< 0
c. x√7 when x> 1
d. x√7 when x> 0

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.