In sunlight, a vertical stick 9 ft tall casts a shadow 7 ft long. at the same time a nearby tree casts a shadow 28ft long. how tall is the tree? round to the nearest tenth

You're locked out of your house. the only open window is on the second floor, 25 feet above the ground. there are bushes along the edge of the house, so you will need to place the ladder 10 feet from the house. what length ladder do you need to reach the window?