Question

Me ajudem na número 10 por favor

Answer 1

9/x+4 = 4/x, 9x = 4x + 16, 9x-4x = 16, 5x=16, x=16/5=3,20m

4^2 = 3,2^2+h^2, 16 = 10,24 + h^2, h^2 = 5,76, h = sqrt 5,76, h = 2,40m