Word promblem

Question

Jeff bought a new cae $10,450. He knows this car's Value will decrease by 20% each year. Jeff writes thr following function to model the cost of his car after "T" years: C(f)=10,450(.80)^t. If Jeffs plans to sell the car after five years, what wull be the value of the car at the time to the nearest dollar.

Answer 1

Hi Maggie,

 

This is a just a chug and plug problem.  You have to take the equation provided in the word problem and put in t=5.

So,

C(f)=10,450(.80)^t

C(f)=10,450(.80)^5

First find out what .80^5 is (remember PEMDAS order of operations)

Which equals .32768 and multiply that by 10,450

The care devalues to the nearest dollar which is $3,424.  

 

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