Question

EXPLAIN PLZ if v=20,000(0.8)^x gives you the cars value after x years about how long will it take for the car to be worth half itz purchase price which is 20,000

Answer 1

\[20000\times0.8^x=10000=>0.8^x=0.5=>x=\log_{0.8} 0.5\approx3.1\]