anonymous
  • anonymous
What is the value of time, t, for the given value of distance, d, and rate, r d=198km, r=36km/h A. 7128 km B. 7128 h C. 5.5 km D. 5.5 h
Mathematics
schrodinger
  • schrodinger
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xapproachesinfinity
  • xapproachesinfinity
36 km = 1 hour 198=x x=198/36
jim_thompson5910
  • jim_thompson5910
\[\Large \text{distance} = \text{speed} * \text{time}\] divide both sides by "speed" to solve for "time" \[\Large \text{time} = \frac{\text{distance}}{\text{speed}}\]

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xapproachesinfinity
  • xapproachesinfinity
speed is r if you are confused
anonymous
  • anonymous
Iknow the answer would be 5.5 but not sure if it is c or d
jim_thompson5910
  • jim_thompson5910
yes, r = rate = speed rate and speed are interchangeable
xapproachesinfinity
  • xapproachesinfinity
well r was km/h so it has to be hours
xapproachesinfinity
  • xapproachesinfinity
km cancels
xapproachesinfinity
  • xapproachesinfinity
you have km/km/h so km disappears leaving only h
anonymous
  • anonymous
So the answer would be d
xapproachesinfinity
  • xapproachesinfinity
and at any rate, time is never km it always something that indicates time like seconds , min , hours

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