Based on the first three (3) recordings, your average heart rate in beats per minute is approximately 84 bpm (mean). Calculating for the standard deviation of the samples, we get about 2.5 bpm. To give the possible heart rates on the fourth, we may solve for the range:
Upper Range = Mean + Standard Deviation = 84 + 2.5 = 86.5 bpm or 87 bpm
Lower Range = Mean - Standard Deviation = 84 - 2.5 = 81.5 bpm or 82 bpm
Therefore the fourth and final recording will likely to fall in the range of 82 - 87 beats per minute. You will win the fitness award!
<em>ANSWER: 82-87 beats per minute</em>
You can get 11 more lobsters if that is what the question is
Use quadratic formula since we can't factor
for 0=ax²+bx+c
so, for
0=1x²-6x-4
a=1
b=-6
c=-4
the solutions are x=3+√13 and x=3-√13
or aprox
x≈6.61 and x≈-0.61
It's probably A (I can't tell you for certain, because I can't see the image, but the other options seem illogical).
