Answer:
The answer is the picture I inserted the way to rewrite it is set-builder notation. Hope this helps :)
Step-by-step explanation:
1- write in set-builder notation
-9.5 because 1/2 simplifies to .5 and 9 is the whole number
301 , 117
=117 : 301
because they are telling to tell ratio of boys to the ratio of total seniors
5*2400=$12,000 is the total costs for 5 decks costing $2,400 each.