The correct spelling of the number "14" is, indeed, "fourteen." The number "40," however, is spelled "forty."
Yes it is spelled correctly
No word is always spelled correctly. But the word "correctly" is correctly spelled as correctly. (see related question)
Yes, surprisingly is spelled with an S. Surprisingly is how you spell it. You spelled it correctly.
Yes, you have spelled prosperous correctly.
You spelled it correctly..
Convenience (easy access or availability) is correctly spelled.
Yes, engineer is spelled correctly in your question.
Correctly: How did Elise spell? She spelled correctly.
You spelled it correctly in the question.
You've spelled it correctly.
You've spelled it correctly.