# MATH

The flashcards below were created by user KattthD on FreezingBlue Flashcards.

1. Label the equations values- A(t) = a(1+OR-r)^t
• A(t)- final amount
• a- initial amount
• t- number of time periods
• r- rate of increase
2. Tony purchased a guitar in 2000 for 12,000. It is estimated that the valuew ill increase by 14% each year. Find when the value of the guitar will be 60,000.
• 60,000 = 12,000(1+.14)^t
• = 12,000(1.14)^t
• 60,000/12,000 = 5
• log1.14^5 = t
• CHANGE OF BASE FORMULA- log5/log1.14 ~ 12.2
• ANSWER: The guitar will be 60,000 in 12.2 years.
3. When graphing an inverse, what can you do to the x and y variables?
Switch the x and y with each other.
4. What happens to the domain and range for the inverse?
They switch with each other.
5. List the steps to writing and inverse.
• 1. Put in y = f(x) format and graph f
• 2. switch x and y
• 3. solve for y
• 4. write in slope-intercept form- y = mx + b
• 5. write inverse and graph
 Author: KattthD ID: 125996 Card Set: MATH Updated: 2012-01-05 03:19:57 Tags: Algebra Folders: Description: Growth and Decay and INVERSES Show Answers: