Find the Unit Vectors That Are Parallel to the Tangent $y = 2 x ^ { 2 }$

question 41

Multiple Choice

Find the unit vectors that are parallel to the tangent line to the curve $y = 2 x ^ { 2 }$ at the point $( 2,8 )$ .

• A) \(\frac { \pm ( 2 \mathbf { i } - 8 \mathbf { j } ) } { 65 }\)
• B) \(\frac { \pm ( 2 \mathbf { i } + 8 \mathbf { j } ) } { 65 }\)
• C) \(\frac { \pm ( \mathbf { i } + 8 \mathbf { j } ) } { \sqrt { 65 } }\)
• D) \(\frac { \pm ( \mathbf { i } + \mathbf { j } ) } { \sqrt { 65 } }\)
• E) \(\frac { \pm ( i - 8 j ) } { 65 }\)

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Definitions:

Traditional Costing Method

A costing methodology that allocates overhead costs to products based on volume-related measures, such as machine hours or labor hours.

Direct Labor-Hours

The complete number of hours dedicated to the direct production of goods.

Overhead Assigned

The allocation of indirect costs to specific jobs or production activities based on a predetermined formula or method.

Traditional Costing

An accounting method that applies indirect costs to products based on a predetermined overhead rate, typically simpler than activity-based costing.