Anyone know the answer to this if you so please help

Match each function with its rate of growth or decay

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?

Solve the equation. then check your solution 8=1.88+a