17/3.5=34/7 or 4.857 45,000x1/2^34/7= 1552.625…. =>1500 nearest hundred dollars. The way this works is say 7 years passed so the value halved twice, you’d do 45,000x1/2=22500 and then 22500x1/2=11250 you can write this as 45,000x1/2x1/2 or rewrite this as 45,000x1/2^2
