Answer: 980
Step-by-step explanation:
Given : A machine produces 280 appliances per hour, the total number of appliances produced in x hours can be represented as a function:
[tex]f(x)=280x[/tex]
The number of appliances can be produced in 3.5 hours is given by :-
[tex]f(x)=280\times3.5=980[/tex]
Therefore, the number of appliances can be produced in 3.5 hours is 980 .