Mashaal Masha
Tanya earns $\$13.50$ per hour at her part-time job. When she works $z$ hours, she earns $13.50z$ dollars. Which of the following expressions gives the amount, in dollars, Tanya will earn if she works $3z$ hours?
Difficulty: Medium
A: 

$3(13.50z)$

B: 

$3+13.50z$

C: 

$3z+13.50z$

D: 

$13.50(z+3)$

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