Let W = 3x Cos 4y $x = e ^ { - t }$

question 20

Essay

Let w = 3x cos 4y.If $x = e ^ { - t }$ and $y = \ln t _ { 1 }$ find $\frac { d w } { d t }$ at the point t = 3.Give your answer to 2 decimal places.

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Definitions:

Probability

The assessment of the probability that a specific event will happen.

Bertrand

Refers likely to Claude Bertrand, a figure associated with the development of techniques or theories in a specific context; without more context, it's hard to provide a detailed definition.

Mullainathan

Likely referring to Sendhil Mullainathan, an economist known for his work in behavioral economics and its implications on social and economic policies.

Dill

Could refer to a variety of contexts, including the herb used in cooking or a concept/person associated with a specialized field; without further context, a precise definition is challenging.