Round answer to 3 decimal point

(1) (3pts) Convert 4.3294 x 109 to decimal notation. (2) (3pts) Convert 0.0000001207 to scientific notation. (3) (3pts each) The model A = 0.183n + 67.895 is used to estimate the life expectancy A of residents of the united States born n years after 1950. (a) According to this model, what is the life expectancy for a person born in 1980? Round to the nearest year. (b) If a person has a life expectancy of 77 years, to the nearest year, when was the person born? (4) (4pts) Solve the inequality 8-4(2-x) 2 -2x. Write your answer in interval notation and graph it on a real number line