Solve the Problem $\frac { d E } { d x } = 2 x + 7$

question 179

Multiple Choice

Solve the problem.
-A certain company has found that its expenditure rate per day (in hundreds of dollars) on a certain type of job is given by $\frac { d E } { d x } = 2 x + 7$ , where $x$ is the number of days since the start of the job. Find the expenditure if the job takes 3 days.

• A) $30
• B) $3000
• C) $13
• D) $1300

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Definitions:

Short-Term Memory

Short-term memory is a cognitive system with a limited capacity that is responsible for temporarily holding information available for processing.

Baddeley and Hitch

Psychologists who proposed the model of working memory, explaining how the brain processes and stores short-term information.

Atkinson and Shiffrin

Psychologists who proposed the multi-store model of memory, which includes the sensory register, short-term memory, and long-term memory.

Memory Storage

The process of retaining information over time, which is critical for learning, decision-making, and personal identity.