A new automobile is purchased for $20,000. If V=20,000(0.8)^x gives the new car’s value after x years, about how long will it take for the car to be worth half of its purchase price?

A)3 years
B)4 years
C)years
D)6 years

Question

A new automobile is purchased for $20,000.  If V=20,000(0.8)^x gives the new car’s value after x years, about how long will it take for the car to be worth half of its purchase price?

A)3 years
		B)4 years
		C)years
		D)6 years

anonymous · Answer

A

anonymous · Answer

thanks love (: how;d yu get it though?

anonymous · Answer

Automobile was purchased for V=$20,000.
Half of its purchase value V/2= $10,000
10,000= 20,000(0.8)^x 
Substitute the given x values in the option. You get V=$10,000 when
 x= 3years

anonymous · Answer

thanks love (: