Based on the clue 'at 46 years 177 days he died at the youngest age o...', what is the answer?

Based on the clue 'at 43 years the reign of this founder of the russi...', what is the answer? What is associated with: at 4341 feet mount victoria on viti levu is the tallest peak in this pacific archipelago? What is associated with: at 4393 feet mount mansfield in this range is the states highest point? Based on the clue 'at 451 feet tall the one named for khufu at giza i...', what is the answer? Based on the clue 'at 465 square miles its californias largest city i...', what is the answer? What is associated with: at 4710 feet deep this african lake is the worlds second deepest lake trailing only lake baika… Based on the clue 'at 49 margrethe ii of this scandinavian country is...', what is the answer? Based on the clue 'at 5 10 she mrs looking straight into the eyes of ...', what is the answer?