2 people need to answer to get brainlist! PLZZ HELP ME!! ASAP
If a = 4 units, b = 8 units, and c = 12 units, what is the volume of the three prisms above?
A.
320 cubic units
B.
240 cubic units
C.
384 cubic units
D.
268 cubic units

Long division setup showing an incomplete calculation. 12 is in the divisor, 6839 is in the dividend, and 5 hundreds and 6 tens is written in the quotient. 6000 is subtracted from 6839 to give 839. an unknown value represented by a box is being subtracted from 839. what number should be placed in the box to complete the division calculation?