Answer:
[tex]A(t)=9t[/tex]
Step-by-step explanation:
-let [tex]t[/tex] be the number of hour Hong work and [tex]A(t)[/tex] denote the amount Hong earns after [tex]t[/tex] hours.
-Given Hong earns [tex]\$9[/tex] for each hour worked, his total earnings at time [tex]t[/tex] can be expressed as:
[tex]A(t)=9t[/tex] #For example, if Hong works zero hours his pay would be [tex]A(0)=9\times 0=0[/tex]
