Name Exponentials and Logarithms- Check 3 Solve the following. 1. 5e -4-6 2. log, (x + 25) - log, (x - 1) = 3 3. Bob wants to save $5,000 for a down payment on a car. To the nearest dollar, how much will he need to invest in an account now with an interest rate of 7.5%, compounded monthly, in order to reach his goal in 3 years? 4. Shannon originally bought a computer for $6500. She knows that computer price depreciates at the rate of 14.3% per year. She decides to sell her computer for $4091.25. How long has Shannon had the computer, round to the nearest year. 5. Use the given formula for the following problem. N(t) = Noeh -1In2 Colbalt-60 is used in food eradication. Given an initial amount of 60 g with a half-life of 5.27 years, determine how long it takes for 80% of the material to decay. Round answers to two decimal places