ANSWER
8, 10, 12, 14, . . .
EXPLANATION
The given rule for the sequence is :
f(n)=2n+6
The domain for a sequence is the set of natural numbers.
When n=1,
f(1)=2(1)+6=8
When n=2,
f(2)=2(2)+6=10
When n=3,
f(3)=2(3)+6=12
When n=4,
f(4)=2(4)+6=14
Therefore the sequence that follows the given rule is 
8, 10, 12, 14, . . .
 
        
             
        
        
        
Answer: The number is 12.
Step-by-step explanation:
Since we have given that 
Sum of two digits = 12
Let the one's digit be 'x'
Let the ten's digit be '12-x'
So, Original number would be 

If 16 is added to the number, then one of the digit is four times the value of the other.
According to question, we get that 

so, the one's digit be 'x'.
Let the ten's digit be '4x'.
so, New number would be 

According to question, it becomes,

So, the number would be 

Hence, the number is 12.
 
        
             
        
        
        
Answer: 315.3 cm / 3.153 meters
Step-by-step explanation:
3,4 meters = 340 cm
340 cm - 24.7 cm = 315.3 cm