Answer:
4 parts 3
Step-by-step explanation:
The picture won’t load re upload it so I can answer.
It is approximately -.4048
H=10^(-pH)
log H = -pH
pH=-logH => so it is affirmed that it is -.40
It’s B
Since 10^-6 means 6 0
the answer in standard form is 2x -5y = -3