HELP ILL REWARD BRAINEST

Which three lengths could be the lengths of the sides of a triangle? 21 cm, 7 cm, 7 cm 9 cm, 15 cm, 22 cm 13 cm, 5 cm, 18 cm 8 cm, 23 cm, 11 cm

How long does it take natsumi to clean up after she is done? table: .area time30. 245. 2.7560. 3.5

Cody was 165cm tall on the first day of school this year, which was 10% taller than he was on the first day of school last year.