A Stone Is Dropped into a Lake, Creating a Circular $45 \mathrm {~cm} / \mathrm { s }$

question 131

Short Answer

A stone is dropped into a lake, creating a circular ripple that travels outward at a speed of $45 \mathrm {~cm} / \mathrm { s }$ . Express the radius $r$ of this circle as a function of the time $t$ (in seconds) and find $A \circ r$ , if $A$ is the area of this circle as a function of the radius.

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Definitions:

Vulnerable

A status indicating that a species is at high risk of endangerment in the wild, often used in conservation contexts to prioritize efforts.

Keystone Species

A species that has a disproportionately large effect on its environment relative to its abundance.

Other Forms

This term is too vague without context, so a specific definition cannot be provided. NO.

Extinction

The permanent loss of a species or taxonomic group of organisms from the Earth, typically as a result of human activity, natural disasters, or changes in the environment.