Pls help me with this
Express 0.0065184 in 3 significant figures​

If you had $1,900,000, how many days would it take you to spend all if you spent $1 a second. (there are 86,400 seconds in a day)

Astick 2 m long is placed vertically at point b. the top of the stick is in line with the top of a tree as seen from point a, which is 3 m from the stick and 30 m from the tree. how tall is the tree?

If olu is twice as old as funmi if the sum of their ages is 60 how old is olu