How do i find the ration of the first number to the second and simplify? 0.4 to 1.2

The ratio of blue cards to green cards is 2 to 5. there are 8 blue cards. complete the diagram and explain how you can find the number of green cards.

Amovie streaming service charges it’s customers $15 a month. martina has $98 saved up. will she have any money left over if she pays for the maximum amount of months she can afford? explain.

Look at this pattern ; 1,4,9, number 10000 belongs in this pattern . what’s the place of this number?