1. andrew ran a marathon in about 1.56 * 10^4s. (a) write andrew’s time in standard notation. (b) evelyn ran a marathon in 4 h and 16 min. who ran the race in the shorter amount of time? show your work.

Answer-

Evelyn ran the race in the shorter amount of time.

Solution-

Time taken by Andrew to run the marathon is,

Converting this into standard notation, we have to write it in hours and minute form. As 1 hour contains 60 minutes or 3600 seconds, so

This is equivalent to 4 complete hours and one third of an hour. One-third of an hour is equal to   minutes, then

Andrew took 4 hours 20 minutes to complete the marathon, whereas Evelyn took 4 hours 16 minutes, so Evelyn took 4 minutes less than Andrew.

Therefore, Evelyn ran the race in the shorter amount of time.

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step-by-step explanation: