Question 436235
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Hi
Suppose p varies jointly as r and t. If p = 1 when r = -5 and t = 2
   p = krt where k is th econstant of proportionality
   1 = k*-5*2
  1/-10 = k = -.1    | p = -.1rt
find t when p = 6 and r = 12.
  p = -.1rt
  p/-.1r = t
  t = p/-.1r  
  t = 6/(-.1*12) = 6/-1.2 = -5       when p = 6 and r = 12