DOES ANYONE KNOW WEDNESDAYS QUESTION PLS HELP I HAVE 5 minutes

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?

Acompany that manufactures and sells guitars made changes in their product range. from the start they had 20 models. then they reduced the number of models to 15. as a result, the company enjoyed a 10% increase in turnover. - how much did the stock level change? in (%)

How can you find the magnitude of a vector, v = < x,y > , where the horizontal change is x and the vertical change is y?