module 4 practice name key exponential...
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Module4PracticeLinearandExponentialFunctions
TE‐8
Name____________KEY____________
Themoldonapieceofbreadhasanareaof0.0001mm2.Theareaofmoldonthebreadtripleseveryday,andthesurfaceareaofthebreadis500mm2. 1.Forthissituation,isthegrowthofmoldonthebreadwithrespecttotimecontinuousordiscrete? Answersshouldbetwoofthefollowingthreewords:Continuous,Exponential,Increasing2.Createatableandagraphdescribingtimeandareainthesituationabove.Makesureeverythingisclearly
labeledandeasytoread.
HourAreaofMold
0 0.0001
1 0.0003
2 0.0009
3 0.0027
4 0.0081
Graphwillbeexponentialwithy‐intercept0.0001.Thescaleusedbystudentswilldeterminethegraph.
3.Writeafunctionoftheareaofthemoldwithrespecttothetimeithasbeengrowing. 0.001 3 4.Abouthowlongwillittakeforthemoldtocovertheentiresurfaceofthebread? Around14daysForeachrepresentationofafunction,decideifthefunctionislinear,exponential,orneither.
exponential
linear
5. Thepopulationofatownisdecreasingatarateof1.5%peryear. 6. Joanearnsasalaryof$30,000peryearplusa$400bonus
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