Solve the Problem $\frac { 2 } { 3 }$ As Many Vibrations as in the Previous Second

question 65

Multiple Choice

Solve the problem.
-After being struck with a hammer, a gong vibrates 20 vibrations in the first second and in each second thereafter makess $\frac { 2 } { 3 }$ as many vibrations as in the previous second. Find how many vibrations the gong makes before it
Stops vibrating.

• A)30 vibrations
• B)70 vibrations
• C)25 vibrations
• D)60 vibrations

---

Definitions:

Vertex

In the context of geometry and graph theory, a vertex is a point where two or more curves, edges, or lines meet. In the context of quadratic functions, it is the highest or lowest point of the parabola.

Intercepts

Points where a graph crosses the axes of a coordinate system, typically identified as x-intercepts (where the graph crosses the x-axis) and y-intercepts (where it crosses the y-axis).

Parabola

A symmetric curve formed by all the points at an equal distance from a point called the focus and a line called the directrix.

Upward

In a direction towards a higher position or level.