Solve the Problem $f ( x ) = \frac { 2.8 x } { 100 - x }$

question 493

Multiple Choice

Solve the problem.
-Suppose a cost-benefit model is given by $f ( x ) = \frac { 2.8 x } { 100 - x }$ , where $y$ is the cost in thousands of dollars for removing x percent of a given pollutant. Find the cost of removing $80 \%$ to the nearest dollar.

• A) \(\$ 2240\)
• B) \(\$ 11,200\)
• C) \(\$ 4000\)
• D) \(\$ 2800\)

---

Definitions:

Proprioception

The awareness of where different parts of one's body are located in relation to each other and the intensity of power applied during physical activity.

Scribbling

A form of pre-writing activity where children make marks, lines, or shapes on a surface, typically for exploration or expression.

Myelination

The process of coating the axons of neurons with a fatty myelin sheath, improving the speed and efficiency of neural signal transmission.

Cortical Development

The process related to the growth and maturation of the cerebral cortex, a critical area of the brain involved in high-level functions like thought and language.