Answer: (13,-7)
Step-by-step explanation:
By using the formula 
is the coordinates of the midpoint.
For finding the midpoint X variable do:

For finding the midpoint Y variable do:
(you can either keep the parenthesis or take them out. Either way, the answer is the same.
Considering coordinate numbers follow the format: (x,y), you'll simply just substitute the numbers found above into their respective places.
x: 13
y: -7
(13,-7).
I believe the answer is 55.49 inches
using the equation C^2/(4*3.14)
Answer:
B
Step-by-step explanation:
80 divided by 6400 is 0.0125, but the question in the picture shows 6400 divided by 80, which is 80.
Answer:
550
Step-by-step explanation: