Answer:
2.2n+4 
Explanation:
0.2n + 2n +4 
The above expression is an algebraic expression . since coefficient 0.2 and 2 have same product n value, they can be added . 
0.2n + 2n = 2.2n
finally, the expression is
2.2n + 4 
From the option above 
2.2n + 4 is equivalent to 0.2n + 2n +4