Respuesta :

Answer:

0.8

Step-by-step explanation:

I Dont know 3, 4, 5 so I am going to just use the normal formula

a^2 + b^2 = c^2

0.6^2 + b^2 = 1^2

0.36 + b^2 = 1

b^2 = 0.64

b= 0.8