A population has size 8000 at time http://edugen.wiley.com/edugen/share...=1221687554198 with http://edugen.wiley.com/edugen/share...=1221687554198 in years.(a)If the population decreases by 100 people per year, find a formula for the population, http://edugen.wiley.com/edugen/share...=1221687554198 at time http://edugen.wiley.com/edugen/share...=1221687554198

(b)If the population decreases by 15% per year, find a formula for the population, http://edugen.wiley.com/edugen/share...=1221687554198 at time http://edugen.wiley.com/edugen/share...=1221687554198

(a) I think it is 8000(-1.0100)^x

PLEASE HELP ME!!!!!!!!!!!