Mr. Jones estimate his profit starting in 2006 will be given by the formula P=7t^2-14t+10 where t is number of years and P is the profit. If this formula is correct, when will Mr. Jones have a profit of more than $1000.00?
solving for 7t^2-14t+10>1000, we get:
7t^2-14t-990>0
use quadratic equation to get:
t> (7+ sqrt(6979))/7; thus:
t> ~12.93 years