1. Solve for the input that corresponds to the given output value. (Round answers to three decimal places when appropriate. Enter your answers as a comma-separated list. Note: Even though the question may be completed without the use of technology, the authors intend for you to complete the activity using the technology you will be using in the remainder of the course so that you become familiar with the basic functions of that technology.)

r(x) =9ln(1.8)(1.8^x);r(x) =9.7,r(x) =20

r(x) =9.7x=

r(x) =20x=

2.A model giving the purchasing power of the 2001 constant dollar is

d(t) =0.023t+ 1.00 dollars

wheretis the number of years since the end of 2001. Based on data between 2001 and 2010.(Note: Constant dollars are used to compare prices over time while removing changes due to inflation or deflation.)

(a) What was the value of a 2001 constant dollar in the end of1995? (Round your answer to two decimal places.)

(b) According to the model, when will the value of a 2001 constant dollar fall below85cents? (Round your answers to three decimal places when appropriate.)

It will take

years since the end of 2001 for the value of a 2001 constant dollar to fall below85cents. This will occur in---Select---JanuaryFebruaryMarchAprilMayJuneJulyAugustSeptemberOctoberNovemberDecember

.

According to the model, when will the value of a 2001 constant dollar fall below80cents? (Round your answers to three decimal places when appropriate.)

It will takeyears since the end of 2001 for the value of a 2001 constant dollar to fall below80cents. This will occur in---Select---JanuaryFebruaryMarchAprilMayJuneJulyAugustSeptemberOctoberNovemberDecember.