Worksheet/Pg. 269/277 Homework

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Worksheet/Pg. 269/277 Homework Pg. 282 #7, 15, 17 Pg. 292 #1 – 20 all #50 81,920; 2.31x1019 #51 P(t) = 20(2)t #52 8.97 months #53 food, health, etc #57 38.05 days #58 117.48 days #27 $669.11 #28 $673.43 #29 $674.43 #30 $674.91 #31 $674.93 #41 $4,161.39 #7 $191,278,744,600.00

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. 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?

5.3 Effective Rates and Annuities Consider a mortgage loan of $80,000 for a 30 year term with interest at 10% APR and monthly payments. Determine the monthly payments Suppose one half of the monthly payment was made every 2 weeks. When would the mortgage loan be completely paid.

5.3 Effective Rates and Annuities Sally contributes $80 monthly into an IRA account that earns 6.25% interest. If Sally starts putting money away when she graduates from college (22), how much money will she have when she retires (67)? You have saved $2,500 to put down on a car and you can afford to pay $220 for monthly payments. If you are approved for a 5 year loan at 7.5%, how much car can you afford?

5.3 Effective Rates and Annuities The half-life of a certain radioactive substance is 21 days and there are 4.62 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 1 gram of the substance remaining?

5.4 Logarithmic Functions and Their Properties

5.4 Logarithmic Functions and Their Properties Solve for x: The Nature of Logarithms Why do we deal with positive x values when dealing with logs? What information do we always know about a log?

5.4 Logarithmic Functions and Their Properties Rewrite the following Logarithms Word Problem!!  Use an algebraic method to find how long it would take a town with a population of 50,250, increasing continuously at the rate of 3.25% yearly, to reach a population of 301,500.