Answer:
The concentration of [ H3O^+] is 1.6 × 10^−7.
Hope I helped! ☺
<h3>
Answer: D) 4</h3>
===========================================================
Explanation:
The width of the confidence interval is 20-12 = 8 units. That cuts in half to get 8/2 = 4 which is the margin of error.
The center of the confidence interval is (12+20)/2 = 32/2 = 16. Add four onto this to get 16+4 = 20, which is the right endpoint. Subtract four from the center to get 16-4 = 12, which is the left endpoint.
Effectively, it's like saying "an archer aims for the value 16 on the number line, and the arrow could land as high as 20 or as low as 12".
The length of x to the nearest tenth is; D: 38.6 m
<h3>Trigonometric ratios</h3>
The image of the triangle is missing and so i have attached it.
From the image attached, we can find the value of x by using trigonometry ratio.
We see that;
Thus;
10/x = cos 75
10/x = 0.2588
x = 10/0.2588
x = 38.64 m
Approximating to the nearest tenth gives;
x = 38.6 m
Read more about trigonometric ratios at; brainly.com/question/13276558
Answer:
1. B. Erie Canal.
2. K. Second Great Awakening.
3. I. Temperance.
4. A. Abolitionism.
5. J. Fredrick Douglass.
6. G. William Lloyd Garrison.
7. C. Grimke Sisters.
8. E. Nat Turner's Rebellion.
9. H. Horace Mann.
10. D. Elizabeth Cady Stanton.
11. F. Seneca Falls Convention.
Answer:
AB = 16 Units
Explanation:
In the given figure, CD is the diameter and AB is the chord of the circle.
Since, diameter of the circle bisects the chord at right angle.
Therefore, AE = 1/2 AB
Or AB = 2AE...(1)
Let the center of the circle be given by O. Join OA.
OA = OD = 10 (Radii of same circle)
Triangle OAE is right triangle.
Now, by Pythagoras theorem:
