We have been given that the garden club earned $15 per hour by weeding neighborhood gardens for t hours.
Let us write an expression for club's earning for weeding neighborhood gardens for t hours.
[tex]\text{Garden club's earning after weeding gardens for t hours}=15\cdot t[/tex]
We are told that a generous donor has agreed to double their earnings. Now let us write an expression for increased earnings of club.
[tex]\text{Club's earning after donor doubled it}=2\cdot(15t)[/tex]
[tex]\text{Club's earning after donor doubled it}=30t[/tex]
Therefore, expression representing garden club's total earning will be [tex]30t[/tex]
