12.
the average distance from earth to the sun is 122.200.000
kilometers. which of the following is the number expressed in
scientific notation? write the distance in scientific notation

for finding the midpoint of any given 2 pair of points simply add the respective x coordinates with other x coordinate and the y coordinate with other y coordinate and divide them by 2

in your question it will be :

(3+1)/2 for the x coordinate of mid point i.e 2

[8+(-4)]/2 for the y coordinate of midpoint i.e 2

so coordinates of mid point of points (3,8) and (1,-4) will be (2,2)

70 years.

step-by-step explanation: