Evaluate √-72k where k= -2

Acommunity group sells 2,000 tickets for its raffle. the grand prize is a car. neil and 9 of his friends buy 10 tickets each. when the winning ticket number is announced, it is found to belong to neil's group. given this information, what is the probability that the ticket belongs to neil? a.1/5 b.1/10 c.1/200 d.1/4

Can someone me with this problem . show your work .

The midpoints of the sides of the large square are joined to form a smaller square. what is the area of the smaller square