Answer:
6,090 papers
Explanation:
If she can grade 435 papers in one hour, she can grade 1,522.5 papers in 3.5 hours, because 435 times 3.5 is 1522.5
if she grades 1522.5 papers in one day, she can grade 6,090 papers in 4 days because 1522.5 times 4 is 6,090.
hope that makes sense