Final answer:
Joshua will pay $1,450.80 as social security tax from his annual income of $23,400, calculated by multiplying the income by the social security tax rate of 6.2 percent.
Step-by-step explanation:
If Joshua earns $23,400 annually and the social security tax is 6.2 percent, we need to calculate the amount of social security tax he will pay. To do this calculation, we multiply his annual income by the percent rate of the social security tax.
Tax payable = Annual Income × Social Security Tax Rate
$23,400 × 0.062 = $1,450.80
Therefore, Joshua will pay $1,450.80 in social security tax.