Let us first convert years to minute.
7 years * (365 days / year) * (24 hours / day) * (60 minutes / hour) = 3,679,200 minutes
a. beats = 75.0 beats/min * 3,679,200 minutes
beats = 275,940,000 beats
Since the original given is 7.0 years (2 significant figures), therefore:
beats = 270,000,000 beats
b beats = 75.0 beats/min * 3,679,200 minutes
beats = 275,940,000 beats
Since the original given is 7.000 years (4 significant figures), therefore:
beats = 275,900,000 beats
Answer:
a) Beats in 7.0 years = [tex]2.7 \times 10^8[/tex]
b) Beats in 7.000 yrs= [tex]2.759 \times 10^8[/tex]
Explanation:
Step 1
Calculation of no. of min. in 7 year
Days in a year = 365
Hrs in a day = 24
Min. in a 1 hr = 60
Min. in a day = 60 × 24
Min. in a year = 60 × 24 × 365
Min. in 7 years
= 60 × 24 × 365 × 7
= 3679200 min.
a) Beats in 7.0 years
Heart rate = 75.0 beats/min.
Beats in 7.0 yrs
= 75.0 × 3679200
= 275940000 beats
No. of significant figure = 2
Answer has to be reported in 2 significant digits.
Beats in 7.0 years = [tex]2.7 \times 10^8[/tex]
a) Beats in 7.000 years
Beats in 7.000 yrs = 275940000 beats
No. of significant figure in 7.000 = 4
Answer has to be reported in 4 significant figures
So, no. of beats in 7.000 yrs= [tex]2.759 \times 10^8[/tex]
