Answer:

Explanation:
Since
is a diameter, arc 
Given that
is a subtended central angle by two diameters,
.
Using the rule of arcs,
→



Answer:
33ft below sea level
Step-by-step explanation:
423-390=33ft
B. I hope this help please let me know if it's correct.
Hello, hope you are having a wonderful day.
A point has 0 dimensions. It has no length, width, or depth.
So any point in space has 0 dimensions.
Now, a line has 1 dimension.
Rectangles, squares and other shapes have 2 dimensions.
Cylinders, cubes, cones and other figures have 3 dimensions.
Hope it helps. Please mark Brainliest; I really need it.
~An emotional teen who helps others with joy
Good luck.