Answer
The angle that the arc between New York and Los Angeles subtends at the center of the earth is equal to 0.619 radians.
Work Step by Step
s = length of arc = 2450 mi
r = radius = 3960 mi
$\theta$ = angle
$$\theta = \frac{s}{r} = \frac{2450 \space mi}{3960 \space mi} = 0.619$$
