Hello. Could you please answer all of these questions? Thanks.

All questions are multiple choice or free response. If the question is free response, enter exact answers or to precisely 3 decimal places. Do not include units in your answers. A motorboat is headed west towards a marina at 17 miles per hour. The distance from the marina to the motorboat is denoted as x. A sailboat leaves the marina headed due north at 4.5 miles per hour. The distance from the sailboat to the marina is denoted as y . The distance between the 2 boats is denoted as = . 4. Is dx , the rate of change of the distance between the motorboat and the marina, positive or negative? 5. What is " when x =20 and y =9? dt 6. Is z , the distance between the 2 boats, increasing or decreasing? 7. Let A represent the area of the triangle formed by the distances x, y, and 2. Find da dt Hint: You will need product rule