Answer should be positive 1 2/3
You can check the picture for the steps
Answer:
d.
Explanation:
Given:
Radius (r) = 7 yd
π = 3.14
Required:
Area of the circle
Solution:
Area of a circle = πr²
Plug in the values into the formula
Area of the circle = 3.14 × 7²
= 3.14 × 49
Area of the circle = 153.86
= 153.9 yd² (nearest tenth)
H+ conc = antilog to negative pH
H+ conc of pH 3 = 1 x 10^-3 M
One unit pH change of the H+ concentration is by a factor of 10. Since pH 3 to pH 5 is 2 unit changes, pH 3 then has one hundred<span> times more H+ concentration than a pH of pH 5. </span>
Option A would be disruptive. Option B may would likely not help and may also be disruptive. Option D would likely not work because he can't get through not understanding. The answer would be Option C.
