The statement on the bottom left is correct. (6 students studied for 20 to 24 hours)
Answer:
(3/4) -(1/4)i
Step-by-step explanation:
Your answer is correct.

Alright, we're in the home stretch here :) All you need to remember is that i² = -1. Otherwise, it is the same as FOIL
(3-2i)(1+7i)
3-2i+21i-14i² ← Replace the i² with -1, then simplify like numbers
3+19i+14
17+19i or C