If 1 gallon of paint covers 300 square feet, how many gallons are needed for a room 30' long x 20' wide x 12' high?

answer is  

a.

93.98 sq. in.

hope you got it chief

the diagram shows you   triangle def with de=4, df=9 and de≠df≠ef.

the sum of the lengths of two triangles' sides are always greater than the length of the third side:

substitute sides lengths:

then 5< ef< 13 (option 3 is true).

def is a scalene triangle with all sides of different lengths (option 5 is true, option 2 is false).

answer: correct choices are 1, 3 and 5