Hello tutor, I need help with the incorrect answers below. Thank you

A ladder V13 meters long rests on horizontal ground and leans against a vertical wall. The foot of the ladder is pulled away from the wall at the rate of 0.8 m/sec. How fast is the top sliding down the wall when the foot of the ladder is 3 m from the wall? (Do not need "- " in the answer.) l l m/sec 0x99 Two cars leave from the same point at the same time. One car travels straight north and the other straight east. After 2 hours, the first car is 60 miles away from the starting point and it is traveling at 70 mph. The second car is 80 miles to the east of the starting point and it is traveling at 65 mph. At what rate is the distance in between the two cars changing at the moment? New" . l lmPh A baseball diamond is a square 90 ft on a side. A player runs from first base to second base at 14 ft/sec. At what rate is the player's distance from home base increasing when he is half way from first to second base? 2 nd base 3 red 1st base base Home Plate ft/sec Submit Answer Tries 0/99A plane is flying away from you at a speed of 750 mph at an altitude of 7 miles. Find the rate at which the angle of elevation is decreasing 71' when the angle is 6 . l7sqrt(3) l rad/hour SubmitAnswer Incorrect. Tries 4/99 Previous Tries