500 x 4 = 2000
OR
500 + 500 + 500 + 500 = 2000
Answer:
Scientific,
Explanation:
If the experiments aren't based on science they could easily be changed and get incorrect results.
The i before e spelling rule goes as such: i before e EXCEPT after c. There are many cases where this is side stepped. However, there is no c in neighbor and the i does not come after the e. So yes, this is an exception of the rule.