7/9 has how many 1/3's in it? how do you solve this ?

Which problem could be  solved  by evaluating the expression  7×(−3)7×-3?

Write a function for a rotation 90 degrees counter clockwise about the origin, point 0

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?