Answer:
Step-by-step explanation:
It is already in standard form and can be expressed in scientific form as:

Answer:
idk but you can ask your teacher for help
Answer:
Step-by-step explanation:
Yes. The commutative property of addition (as well as the commutative property of multiplication) applies to all real numbers, and even to complex numbers. As an example (for integers):
5 + (-3) = (-3) + 5