Marilyn Bought a Stock for $80 Last Week

question 349

Short Answer

Marilyn bought a stock for $80 last week. Yesterday, the stock went up by 20%. Today it dropped by 20%. What is the current value of the stock?

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Definitions:

Action Potential

A rapid rise and subsequent fall in voltage or electrical charge across a cellular membrane, typically neurons, signaling along the nerve.

Resting Membrane Potential

This refers to the voltage difference across the membrane of a resting (non-conducting) neuron, maintaining a balance of ionic gradients.

Plasma Membrane

The lipid double-layer that enwraps the cell's cytoplasm, directing the flow of substances into and away from the cell.

Sodium-Potassium Pump

A membrane-bound enzyme complex that exchanges sodium ions for potassium ions across the plasma membrane of cells, crucial for cellular function.