Answer
a) $87.0~beats/min$
b) there will be more beats per minute
c) $93.0~beats/min$
Work Step by Step
(a) We can find the number of heart beats per minute as follows:
$heart \space rate=(1.45\frac{beats}{s})(\frac{60s}{min})=87.0~beats/min$
(b) We know that if the frequency (or the number of beats per second) increases then it is obvious that there will be more beats per minute.
(c) We can find the number of heart beats per minute as follows:
$heart \space rate=(1.55\frac{beats}{s})(\frac{60s}{min})=93.0~beats/min$
