Question

a painter charges $20 per hour. earnings are represented by e(h)=20h for h hours. what is an impossible input? 1, -3, 7, 4

Explanation:

Step1: Understand the context

The function \( E(h) = 20h \) represents the painter's earnings, where \( h \) is the number of hours worked.

Step2: Analyze possible values of \( h \)

In the real - world context of hours worked, the number of hours \( h \) cannot be negative because you cannot work a negative number of hours. Among the given options (1, - 3, 7, 4), - 3 is a negative number. So, - 3 is an impossible input for the function \( E(h)=20h \) as it does not make sense in the context of hours worked.

Answer:

-3