1. Pg. 282/292 Homework Study #7$749.35 #15$230.43 #17$884.61 #1x = 2 #2x = 1#3x = 3 #4x = 4 #5x = -4 #6x = 0 #7no solution #8x = 2 #9Graph #10Graph #11Graph #12Graph #13x = 81 #14x = 32 #15x = 5 #16x = 8 #17x = #18x = ± ½ #19x = ± 3 #20 x = 0, x = 2

2. 5.3 Effective Rates and Annuities An $86,000 mortgage for 30 years at 12% APR requires monthly payments of $884.61. Suppose you decide to make monthly payments of $1050.00 instead. When would the mortgage loan be completely paid? Suppose you make payments of $884.61 for that same $86,000 mortgage for 10 years and then make payments of $1050.00 until the loan is paid. In how many years total will the mortgage be completely paid?

3. 5.1 – 5.4 Quiz Review Solve for x:Graph the following functions: Describe each transformation and determine the domain and range.

4. 5.1 – 5.4 Quiz Review Word Problems!! Compare the values of a $20,000 investment compounded weekly at 6.75% APR for 10 years with an investment compounded semi-annually for 11 years at 6.5% APR. Your goal is to save $200,000 in 35 years. If you put $325 dollars in an account every month, at what interest rate will your account need to be compounded monthly in order to reach your goal?

5. 5.1 – 5.4 Quiz Review You are buying a car and getting a loan for $18,000. If your interest rate is 3.5% for 5 years and you will be making monthly payments, what will your monthly payment be? Suppose a culture of 1,000 bacteria are put in a petri dish and the culture doubles every 3 hours. – Find when the number of bacteria will be 350,000. – Find when the number of bacteria will be 10 times their initial size.

6. 5.1 – 5.4 Quiz Review The half-life of a certain radioactive substance is 35 days and there are 6.5 grams present initially. – Find an algebraic expression for the amount A of substance remaining as a function of time. – Find a complete graph of the function. – When will there be less than 2.5 gram of the substance remaining?