Answer to Three Decimal Places

Multiple Choice

$\text { Find } a _ { \mathbb { N } } \text { at time } t = 2 \text { for the space curve } \mathbf { r } ( t ) = ( 5 t - 7 ) \mathbf { i } + t ^ { 2 } \mathbf { j } - 7 t \mathbf { k } \text {. Round your }$ answer to three decimal places.

A) 0.970
B) 0.465
C) 0.930
D) 1.814
E) 1.060