
Answer:
Step-by-step explanation:
1985:
x = 5 years  ( 1980 to 1985- 5 years)
0.142x + 1.93 = 0.142*5 + 1.93
           = 0.71 + 1.93
           = $ 2.64
          Â
1999:
x = 19 years
0.142x + 1.93 = 0.142*19+ 1.93
           = 2.698 + 1.93
           =4.628 =  $ 4.63
          Â
2010:
x = 30 years
0.142x + 1.93 = 0.142*30 + 1.93
           =  4.26 + 1.93
           = $ 6.19
         Â