The pygmy shrew weighs less than an ounce and has the fastest heartbeat of any mammal.
Its heart beats about 4 x 106 times each hour! An adult human heart beats about 8 x 10^
times each hour.
Use these numbers to complete the sentence below. Write your answer in standard form,
without using exponents.
The pygmy shrew's heart beats
e to search
times as fast as an adult human heart.