
Mark M. answered 12/22/17
Mathematics Teacher - NCLB Highly Qualified
tu = AB
The return trip took 0.9t (2t - t - 0.9t)
AB = 0.9tr
tu = 0.9tr
u = 0.9r
1.11...u ≈ r
Dalila K.
asked 12/22/17Mark M. answered 12/22/17
Mathematics Teacher - NCLB Highly Qualified
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