Marco left his house and went to the sporting goods store to buy a basketball. He then went to Jay’s house. Together the boys headed to the park along the route shown. How far did Marco travel in all?

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?

1: 4 if the wew 35 surfboards at the beach how many were short boards?

Which of the following is the major negative aspect of crossover designs for research studies? a. prohibitive cost b. residual effects c-subject drepout d. incomplete randomization e. large sample size required