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

Step-by-step explanation:

Given: 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.

The use decreased in x years is given by the formula:-

,

Where A is the initial amount = 14.6 million tons.

r is the rate of decrease in decimal= 0.066

Then, the use of coal in 2010 (after 60 years)=

3.73 * 10^7 is the anser for ttm ur welcome < 3

step-by-step explanation:

part a: triangles gcb and epb

part b. sides cg and rp are parallel by definition of parallelogram.

angles cgb and e are congruent by being alternate interior angles of parallel lines cut by a transversal. angles gbc and ebp are congruent because they are vertical angles. by aa similarity, the triangles are similar.

part c. since the triangles are similar, the ratios of the lengths of corresponding sides are equal.

calculation of be:

gb/be = cb/bp

(400 ft)/be = 300/200

(400 ft)/be = 3/2

3be = 2 * 400 ft

3be = 800 ft

be = 800/3 ft

calculation of pe:

gc/pe = cb/bp

(350 ft)/pe = 300/200

(350 ft)/pe = 3/2

3pe = 2 * 350 ft

3pe = 700 ft

pe = 700/3 ft