Last year the depth of the river was 4.2 feet deep. This year it dropped 21%.

Find the depth of the river this year to cross it.
PLEASE HELP ME

You are cycling around europe with friends. you book into a hostel and you ask the owner what the ratio of men to women is currently staying there. there are 24 men and 6 women. what is the ratio of men to women in its simplest form?

What is the solution to the equation? k/6.4=8.7 2.3 5.568 15.1 55.68

I’m really confused and need your assist me with this question i’ve never been taught