Car is bought for $2400, the value decreases at 15% per year. To the nearest tenth of a yr how long until the value is 10000

Use the formulas a = x 2 – y 2, b = 2xy, c = x 2 + y 2 to answer this question. one leg of a right triangle has length 11 and all sides are whole numbers. find the lengths of the other two sides. the other leg = a0 and the hypotenuse = a1