Given :
Full-time employee who works 40 hours per week earns $20.50 per hour.
To Find :
The weekly income and annual income after round off .
Solution :
Weekly income is given by :
[tex]C =40\times 20.50\\\\C=\$ 820[/tex]
Now , round off of hourly in come to nearest dollar is $21 .
So , new weekly income is :
[tex]C'=40\times 21\\\\C'=\$ 840[/tex]
Now , annual income is :
[tex]A=C'\times 50\\\\A=\$840\times 50\\\\A=\$42000[/tex]
Therefore , weekly income and estimated of annual income is $42000 .
Hence , this is the required solution .