question 79

Essay

$$\text { Find } \mathbf { r } ^ { t } ( t ) \text { and } \mathbf { r } ^ {tt } ( t ) \text { for } \mathbf { r } ( t ) = \langle t \cos 9 t - \sin 9 t , t \sin 10 t + \cos 10 t \rangle$$

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Definitions:

Shampoo

A hair care product designed to clean the scalp and hair, removing dirt, oils, and other impurities, often formulated with various ingredients for different hair types and needs.

Objection

A challenge or disagreement voiced by a potential buyer in response to a sales pitch, needing to be addressed by the salesperson.

Price

The amount of money required to purchase a good or service.

Cost

The amount of money or resources expended to purchase or manufacture a product or service.