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Amanda and Alexis live 4 miles apart. They decide to start walking toward each other’s houses at the same time. Amanda walks at a rate of 3.5 miles per hour and Alexis walks at a rate of 4 miles per hour. How long will it take for them to meet? Round to the nearest hundredth of an hour. [Remember: D = (r)(t)]

Respuesta :

AL2006
-- Amanda walks at the rate of  3.5 mph .
-- Alexis walks at the rate of  4 mph .
-- The space between them closes at the rate of (3.5 + 4) = 7.5 mph .

They'll meet when the space between them becomes zero.

                                     D  =  (r) (t) .

                                   4 miles  =  (7.5 mi/hr) (t)

Divide each side
by  7.5 mph :              4 mi / 7.5 mph  =  t

                                     t  =  (4/7.5) hour  =  0.53 hour

                                                                   =  32 minutes

Answer:  

The answer is 0.53 hour

Explanation:

I did the lesson on edge

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