Please Help!! An investment firm invested $2400 into two accounts. $1700 went to an 8% annual rate account. The rest went to a 13% annual rate account. The interest the first year amounted to:

You dug a hole that was 8 feet deep. after taking a short break, you dug down 3 more feet in the same hole. when finished digging, a tractor accidentally filled the hole with 4 feet of dirt. how deep is your hole now?