11-08-202 Hormeiak 2 The table below indicates the number of heart beats in the average lifetime of various mammals. It also lists the average pulse rate per minute for these mammals. Resting (beats per minute) 25 Rates Number of beats in average life time 591 300 000 Pulse Mammal Elephant Humans 2 649 024 000 525 600 000 551 880 000 72 Dog Rat 100 350 1.1 Note that the number of heart beats in the average life time of elephants, dogs and rats are all between 500 000 000 and 600 000 000 but for humans it is very much greater. Approximately how many times more does the human heart beat in its average life span compared to these other mammals? 18.2 Use the information in the table to calculate the average life span of elephants. Show all your calculations. (1) (4)

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