The correct answer for 12

Which of the following values have 3 significant figures? check all that apply. a. 10.1 b. 100.05 c. 120 d. 129

Can someone answer and tell me how to do this (will mark brainliest)

John and jean are married and decide to open three separate accounts for their money. what is the most likely reason for their decision? a.they have too much money and can’t keep it in a single account. b.john and jean are part of a dual-income family. c.the bank does not allow more than one person to open an account. d.they want someone else to handle their finances.