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)
The answer is 692.857143
Hope this helps! :)
Step 1: Find the slope of the line. To find the slope of the given line we need to get the line into slope-intercept form (y = mx + b), which means we need to solve for y: The slope of the line 3x – 5y = 9 is m = 3<span>/5. Therefore, the slope of the line parallel to this line would have to be </span>m = 3<span>/5.</span>
Boy: x
girl: x - 53
father: 4(x - 53)
Now you simplify.