Respuesta :
Answer:
$246.75.
Step-by-step explanation:
Multiply 21 by $11.75 to find how much she earned because you're finding the total amount of money after 21 hours. Using a calculator, she earns $246.75 after 21 hours because each hour she gets another $11.75. If you need further elaboration, please let me or another Brainly user know. Thanks!