Review: 9.4d Mini-Quiz 1. The time t for a pendulum of length L to go through one cycle is given by...
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Transcript of Review: 9.4d Mini-Quiz 1. The time t for a pendulum of length L to go through one cycle is given by...
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?
322
Lt
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 9Radical Expressions and Equations
Lesson 9-4bRadical 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.
140 xp
Answer:The demand for the video game is 401 units when the price is set at $20.
14020 x
120 x
120 x
1400 x
x401
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.
l05.0
4800200
Answer:The length of the string when the velocity is 200 meters per second is about 0.42 meters.
05.0
4800000,40
l l000,96000,40 l416.0
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.
Homework539/87 and 89
Stand Up Please