Find the exact interest for $600 at 8% for 45 days. (round to the nearest cent.)
a. $6.36
b. $5.95
c. $6.00
d. $5.92

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)

1/5^2 = 7.56/45