meredith48034
meredith48034 meredith48034
  • 08-08-2018
  • Mathematics
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Please help me right away.

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gmany
gmany gmany
  • 09-08-2018

[tex] \dfrac{D(t)}{R(t)}=\dfrac{400-120t}{450-150t}=\dfrac{10(40-12t)}{10(45-15t)}=\dfrac{40-12t}{45-15t}\to\boxed{a.} [/tex]

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