The annual rate of coal production in the US (in billions of tons per year) is given by the function a(t), and the total amount of coal produced (in billion tons) since 1900 is given by c(t), where t represents years since 1900. If the total amount of coal produced is 27.5 billion tons higher in 1955 than it was in 1930. Required:
Write an integral to represent the 1997-2009 coal production.

where is the figure

-362

step-by-step explanation:

(12)(4)+2(12)-34(12)+2(12)-3

  \/         \/         \/         \/

  48 +   24 -   408 + 24 - 3

      \   /               \   /

          72     -     432 - 3 = -363

47.28 or 47.2857143

step-by-step explanation:

you just divide 331 by 7 and you get that answer. ( i think so tho)

i think its doubled. let me know

step-by-step explanation: