6+√-80 ?
a.6+16√5i
b.6+4i√5
c.6+16i√5
d.6+4√5i
√-121 ?
a.-11i
b.11i
c.-11
d.11
√-48 ?
a.-4√3
b.4√-3
c.4i√3
d.4√3i

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?