She spent $7.44 because 3.28 + 1.27 + 0.56 + 2.33 = 7.44
If we let x as the number of years of service in the company and f(x) as the increase in the wage, the step wise function that describes the scenario is
f(x) = { 0.5, x < 3
{ 1.0, 3 ≤ x < 6
{ 1.5, 6 ≤ x < 9
{ 2.0, 9 ≤ x < 12
The point (2, 12) represents the wage increase of x < 12
<span>3.9 - 0.234 = 3.666
Hope it helped
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Then a is Half of 45 wich is 22.5 I believe.
