3. Simple Interest P = 500t = 6/12r =.06 Time must be measured in years. P = 8000r =.05t = 3 n = 4 n = 12 n = 365 A = Pe rt

4. n = 12

5. Convert to log.

6. Growth r > 0…Decay r < 0. k < 0 will cause the temperature to decay. Room Temperature. Oven Temperature.

7. X min & max;Y min & max 125.2 grams Divide by 100Convert to ln & simplify.Divide by.045 The population would be N(t) = 200 and 200 will be divided by 100 so ….. Convert to ln.Divide by.045

8. T = Room Temperature = 30 o u 0 = Oven Temperature =100 o Substitute in the temperatures into the formula and simplify. Substitute in 80 o for u(t) & time of 5 minutes for t and solve for k. Subtract 30. Divide 70. Convert to ln & simplify. Divide 5. Rewrite the formula w/ k. Substitute in 50 o for u(t) and solve for t. Subtract 30. Divide 70. Convert to ln & simplify. Divide -.0673.

9. X min & max; Y min & max Trace, 5, and Enter2 nd Trace, Intersection, Enter on all 3 questions. 39.2 minutes The temperature is approaching room temperature of 30 o C. H.A. y = 30. Change Y 2 to 35.

10. Enter the data to L 1 & L 2. Do an ExpReg. STAT, CALC From the calculator, the exponential equation is… Your uncle wants the equation in the form STRONG Correlation! t = x, therefore e r = 1.085567777 Solve for r. Convert to ln. Write equation. $45,047.31

11. Enter the data to L 1 & L 2. Do a LnReg. STAT, CALC Store in Y 1 STRONG Correlation! x = 1650 y = 156 computers You can type it all in or since we stored the equation in Y 1, store 1650 for x and ask for Y 1.