Help pleases last question

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?

What is the perimeter of a rectangular building that is 80 feet wide and 140 feet deep?

How do you create a data set with 8 points in it that has a mean of approximately 10 and a standard deviation of approximately 1?