You can use this one app it’s called Cymath it’s really helpful with these types of problems,
Answer:
about 2.47
Step-by-step explanation:
Your calculator will tell you ...

The partial would be
40x5=200
2x5=10
210
Your just breaking them apart
Answer:
10
Step-by-step explanation:
5 choose 2 is 5x4/2, which is 20/2, which is 10.
59,424.77 rounded to the nearest square mile is 59,425.