The area of a trapezoid is given by the formula a=1/2 (b1+b2)h, where base b1 is parallel to base b2 and h is the height. solve the formula for b2. show your work

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?