What are the greatest commom factor of 2x2x3x5 and 2x3x3x5​

Gregory draws a scale drawing of his room. the scale that he uses is 1 cm : 4 ft. on his drawing, the room is 3 centimeters long. which equation can be used to find the actual length of gregory's room?

Find an equation of the line perpendicular to the graph of 28x-7y=9 that passes through the point at (4,1)

Choose the more precise measurement. 26.4 cm or 8.39 cm