#### Answer

a)
The number $2927.404$ to the nearest hundredth is $2927.40$.
b)
The number to the nearest ten is $2930$.

#### Work Step by Step

a)
Since the last digit after the decimal is less than $5$, the previous digit of it will remain the same.
Therefore, the number to the nearest hundredth will be $2927.40$.
b)
Since the tenth digit is less than $5$, we can remove the decimal part.
Hence the number to the nearest ten is $2930$.