There's no way to know this without knowing the number of pencils he started with
X has to be inside the radical.
It would be

Simplify the radical by breaking the radicand up into a product of known factors.
Answer: . Rotation about the y-axis by π
Step-by-step explanation:
The ratio of building heights will be the same as the ratio of shadow lengths.
(taller building)/(shorter building) = (longer shadow)/(shorter shadow)
(taller building)/(84 ft) = (110 ft)/(46 ft) . . . . . . fill in the given numbers
(taller building) = (84 ft)*(110/46) ≈ 200.9 ft . . multiply by 84 ft, evaluate
The appropriate selection is
D) 200.9 ft