The following are the ages (years) of 5 people in a room: 20, 24, 13, 15, 25 a person enters the room. the mean age of the 6 people is now 19. what is the age of the person who entered the room?

Calculate the density of benzene if 300ml of it weighs 263g. a. 0.88 g/ml b. 1.14 g/ml c. 78,900 g/ml d. 37 g/ml

Currently, the largest cruise ship has a tonnage of 225,282 gross tons (gt). which of the following is a reasonable estimate for the tonnage of this cruise ship? a. 2 × 10^5 gt b. 2 × 10^6 gt c. 2 × 10^-5 gt d. 2 × 10^-6 gt

What’s the answer? and how do i solve it ?