Question 1176257
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Hi
{{{H(t) = 120+55e^(-t/30)*cos(t*pi/4)}}}
Using FREE graph software  https://www.padowan.dk/download/ 
  H(4) = 57.1553
  H(8) = 191.8083
  H(12) = 37.9496 
Wish You the Best in your Studies.
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