Respuesta :

wegnerkolmp2741o

Answer:

z =0.001

Step-by-step explanation:

log z + 12 = 9

Subtract 12 from each side

log z + 12-12 = 9-12

log z = -3

Raise each side to the base of 10

10^ log z = 10 ^-3

z = 10 ^-3

z =0.001