The amount of money, \(a\), in dollars, Charlie earns for working \(t\) hours is modeled by the equation \(a = 15.50t + 25.50\). What does the number \(15.50\) mean in this context?
the amount of money earned in a day
the number of hours worked to earn \(\$25.50\)
the initial amount of money earned
Charlie’s hourly rate of pay
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