Jessie hops for 1 minute then rests for 15 seconds. she repeats this pattern for several minutes. write a pattern showing the number of seconds when jessie switches from one activity to the next. after how many seconds will she start resting for the fourth time

She will start resting for the fourth time in 60 seconds

60secs 15secs 60secs 15secs 60secs 15secs 60secs 15secs
  hop        rest     hop        rest      hop       rest    hop        rest

So now we add 60+15+60+15+60+15+60 = 285

Jessie will have been hopping and resting for 285 seconds before Jessie starts resting the 4th time.