Answer:
The answer is option 3.
Step-by-step explanation:
You have to substitute H+=2×10^(-9) into the equation of pH :
pH = -log[H+]
H+ = 2×10^(-9)
pH = -log[2×10^-9]
= 8.70 (3s.f)
28(8) = 224
224(5) = 1,120
1,120(50) = 56,000
Answer: 56,000
Answer:
A. 
Step-by-step explanation:
The third order polynomial is factored herein:


Which represents answer A.
Answer:
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Domain is the set of numbers you can use
usually, domain=all real numbers except those that divide by zero
so find those exceptions
find what numbers make deonenator equal to 0 and exclude them
x-23 is denom
x-23=0
x=23
doman is all real numbers except 23