Formula: a=1/2bh where b is the base and h is the height

Sara !  You've GOT the formula to use.  You typed it right there in the question.  So go ahead.  Take the formula, write '12' in place of 'b', write '15' in place of 'h', do the multiplication, and the answer is the area of the triangle.  I get 90 square inches when I do it in my head.  You should check my work.

A. 4/5

P(A)’ = 1 - P(A)

1 - 1/5 = 4/5

Step-by-step explanation: