Is BC=2.3 one of the options?
For that question, you can use the cosine rule, where;

In this case, we have..

Solving for BC with this will get you 2.250406, rounded off to the tenth is 2.3.
Answer: 4/5 of an hour
Step-by-step explanation: 1/5 times 4 is 4/5
Hold on what grade is this so I can do it?
Answer:
Your answer would be A) Drag 5 sets of negative 2 to the window
I hope this helps.