Problema Solution
a person take their pulse before they began tu run. theit pulse is beating 63 beat per minute. then they began to run. they run for 30 minutes theire pulse is measure again. it is now 135 beats per minute. if the pulse increases every 10 minutes by 15 beats how fast is theire pulse after 50 minutes if their pulse started at 63 beats per minute. use a number line to show your work
Answer provided by our tutors
On the number line, we would mark off 63+n15 where n=0,1,2,3,4,5, etc. Since the question asks how fast is the pulse after 50 minutes and the pulse increases every 10min, we know that the pulse will increase 5 times (50/10) during the 50min run. Therefore, we would look for the fifth number after 63 that we marked. This would be the answer. Since a number line cannot be reproduced here, we will put the various pulses after 0,10,20,30,40, and 50min below:
0: 63
10: 63+15=78
20: 63+15+15=93
30: 63+15+15+15=108
40: 63+15+15+15+15=123
50: 63+15+15+15+15+15=138