Answer:
um i dont know
Step-by-step explanation:
-2
-2-15
-2 +(-15)
-17
Volume = l*w*h
Equation: 1620 = 9*9*h
1620=81h
h=20 cm
19.5 because 6 minus 5.5 is equal to 0.5 and if you just add 0.5 to 19.5 it will be 19.5