Answer:
Scale Factor of 4, and
At a scale factor of 5, the new area = 75 units^2
Explanation:
Triangle A area = 15 units^2
Triangle B area = 60 units^2
Scale Factor = (60 units^2)/(15 units^2) = 4
At a scale factor of 5, the new area would be 5*(15 units^2) = 75 units^2