In 1950 the use of coal in the us was 114.6 million tons the use of coal has decreased by 6.6% per year since then estimate the amount of coal used in the us in 2010 round to the nearest tenth of a million tons

he earned 78.75 in interest.

step-by-step explanation:

70 years.

step-by-step explanation:

step-by-step explanation:

given that ab is divided into equal parts as

ac, cd, de, ef, fg, gh, hi, ib.

from this we find that f is the midpoint of ab.

so using mid point formula we find

f = (3,7)

similarly considering fb, we get

h = mid point of fb = ((6,6) and g, mid point of fh is

g = (9/2, 13/2)

i is mid point of hb

so i =(15/2,11/2)