Review: 9.4d Mini-Quiz 1. The time t for a pendulum of length L to go through one cycle is given by the formula: How long is the pendulum of a mantel clock.

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Presentation transcript:

Review: 9.4d Mini-Quiz 1. The time t for a pendulum of length L to go through one cycle is given by the formula: How long is the pendulum of a mantel clock with a period of 4 seconds? 2. A 12 foot skateboarding ramp has a height of 4 feet (see the figure). Find the base length of the ramp.

Class Greeting

Chapter 9 Radical Expressions and Equations Lesson 9-4b Radical Equations and Applications

Objective: The students will solve word problems involving radical equations. (continued)

Applications of Radicals

The demand equation for a video game is: where x is the number of units demanded per day and p is the price per game. Find the demand when the price is set at $20. Answer: The demand for the video game is 401 units when the price is set at $20.

The vibration of a string on a guitar depends on the length of the string. The table shows the velocities v (in meters per second) at different lengths l (in meters). Graph the data and approximate the length of the string when the velocity is 200 meters per second. Verify your approximation by solving the equation.

Answer: The length of the string when the velocity is 200 meters per second is about 0.42 meters.

Lesson Summary: Objective: The students will solve word problems involving radical equations. (continued)

Preview of the next Lesson: Objective: The students will practice for the Midterm Exam.

Homework 539/87 and 89

Stand Up Please