The only vowel sound in "day" is the long A sound.
The vowel sound in "rice" is /aɪ/ as in the word "eye".
The vowel preceding the E at the end of the word is the vowel before the E. Usually the vowel that has the long vowel sound (says its name).
Yes, the word "cavity" has a short vowel sound. The "a" in "cavity" is pronounced with a short "a" sound like in "cat."
Yes. The AY has the long A sound.
South Carolina pound ended in 1793.
WTA South Carolina ended in 1987.
South Carolina Classic ended in 2000.
USRC South Carolina ended in 1798.
South Carolina Railway ended in 1894.
South Carolina Railroad ended in 1881.
Yes, the word "doubt" ends with a vowel sound, even though the letter "t" is at the end of the word.