$\text { Find } a _ { \mathrm { N } } \text { at time } t = 1 \text { for the plane curve } r ( t ) = 9 t ^ { 2 } \mathbf { i } + 5 t \mathbf { j } \text {. Round your answer to }$ three decimal places.
A)6.581
B)4.818
C)3.407
D)2.154
E)4.962

Question

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The Answer of $\text { Find } a _ { \mathrm { N } } \text { at time } t = 1 \text { for the plane curve } r ( t ) = 9 t ^ { 2 } \mathbf { i } + 5 t \mathbf { j } \text {. Round your answer to }$ three decimal places.
A)6.581
B)4.818
C)3.407
D)2.154
E)4.962

Three Decimal Places