Find the value of x in the figure below: 20 60 180 40

The triangles are similar. what is the value of x? enter your answer in the box. x = two right triangles. the larger right triangle is labeled x on the longer leg, 12 on the shorter leg and 20 on the hypotenuse. the smaller triangle is labeled 4 on the longer leg, 3 on the shorter leg, and 5 on the hypotenuse.

How do i do this activity, is appreciated

Aboat costs 19200 and decreases in value by 12% per year. how much will it cost in 5 years