The Site from Which an Airplane Takes Off Is the Origin.The

Multiple Choice

The site from which an airplane takes off is the origin.The x axis points east;the y axis points straight up.The position and velocity vectors of the plane at a later time are given by $\overrightarrow { \mathbf { r } } = \left( 1.61 \times 10 ^ { 4 } \hat { \mathbf { i } } + 9.00 \times 10 ^ { 3 } \hat { \mathbf { j } } \right) \mathrm { m }$ and $\overrightarrow { \mathbf { v } } = ( 150 \hat { \mathbf { i } } - 21 \hat { \mathbf { j } } ) \frac { \mathrm { m } } { \mathrm { s } }$ . The magnitude,in meters,of the plane's displacement from the origin is

A) 9.14* 10³.
B) 1.61 * 10⁴.
C) 1.84 * 10⁴.
D) 9.14*10³t.
E) 1.61 *10⁴t.