Which number sentence should be used to solve this problem? ethan collected 30.4 pounds of recycling in june. he collected 35.5 pounds in july.

how many more pounds of recycling did ethan collect in july than june?

a.
30.4 + 35.5 = ?

b.
35.5 - 30.4 = ?

c.
30.4 - 35.5 = ?

d.
35.5 + 30.4 = ?