anonymous
  • anonymous
What is the value of time, t, for the given values of distance,d, and rate r? D=315mi, r=45mi/h A. 7h B. 7mi C. 14174 h D. 14174 mi
Mathematics
katieb
  • katieb
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anonymous
  • anonymous
mathstudent55
  • mathstudent55
\(rate~of~speed = \dfrac{distance}{time} \)
shadow13
  • shadow13
its between b and c i believe

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mathstudent55
  • mathstudent55
\(r = \dfrac{d}{t} \) \(t = \dfrac{d}{r} \)
mathstudent55
  • mathstudent55
The question is what is the time. The 4 choices have units of miles or hours. A time must be in hours, not miles, so the only possible answers are A. and C. Use the equation above to find out which one is correct.
mathstudent55
  • mathstudent55
time = distance divided by rate
anonymous
  • anonymous
@mathstudent55 so i think that the answer would be A
shadow13
  • shadow13
its equals 7 h so yes u ar crecet
anonymous
  • anonymous
ok thanks @shadow13
shadow13
  • shadow13
welcome and this is how i got it Okay so you are traveling at 45 miles an hour and covering 315 miles. Let's divide 315 by 45 to see how many hours we spent. 315/45=7 You spent 7 hours
shadow13
  • shadow13
anything else my friend
mathstudent55
  • mathstudent55
Yes, the answer is 7 h.

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