Answer:
The first one
Step-by-step explanation:
Answer:
hours
Step-by-step explanation:
Let x be the time ( in hours ) you feel good and y be the time ( in hours ) that you get tired.
As per given , we have
x+y= 8
Since : 
So , we have
20x+12y=122
According to the given question , we have the following system of equations ,

Multiply 12 on both sides of equation (1) , we get

Eliminate equation (3) from (2) , we get

Hence, you felt
hours good.
The answer is 6. 49 you welcome :)
X = 126
HOPE THIS HELPS!!!!!!!! :D
Step-by-step explanation:
The final balance is $12,088.87.
The total compound interest is $2,088.87.