Which of these expressions is in simplified form?

A.

B.

C.

D.

Compute the value of |6 i|

A.12i

B.6 + 6i

C.6

D.

Choose thebestdescription of the radical expression.

A.It can be simplified to 3.

B.It can be simplified tobut no further.

C.It can be simplified, but the result is a complex number.

D.It is in simplified form.

Which of the followingbestdescribes imaginary numbers?

A.They are the values of expressions of the formfor various real numbersa, as long asa 0.