Answer:
m + 3.4 kilograms.
Explanation:
Let's call the mass of an average man's brain "m" kilograms.
According to the information given, the mass of an average elephant's brain is 3 4/10 kilograms greater than an average man's brain. This means that the mass of an average elephant's brain can be calculated as:
m + 3 4/10 = m + 3.4
So, the mass of an average elephant's brain is 3.4 kilograms greater than the mass of an average man's brain, which is m kilograms.
Therefore, the mass of an average elephant's brain is m + 3.4 kilograms.