Answer:
Deana's claim is correct that the heart beats 4.8*10^3 times per hour.
Step-by-step explanation:
Given that human heart beats 80 time per minute.
In order to check Deana's claim we have to calculate number of beats in one hour.
As we know that
1 hour = 60 minutes
So the heartbeats in 60 minutes:
[tex]= beats\ per\ minute * 60\\=80*60\\=4800\ beats[/tex]
Converting the result into scientific notation gives us:
[tex]4800 = 4.8 * 1000 = 4.8*10^3\ beat[/tex]
Hence,
Deana's claim is correct that the heart beats 4.8*10^3 times per hour.
