Respuesta :
Let the mass of the screw Cayden added be = x
The initial reading of the scale = 80.955
After adding 1 more screw, scale reads = 84.81
So, the mass of the screw that was added = [tex]84.81-80.955=3.855[/tex]
Hence, the last screw had a mass of 3.855
Answer: 3.855
Step-by-step explanation:I just did it is correct