Answer :
Answer: His baseball cards can be represented as 0.8 of the entire collection
Step-by-step explanation: Castor has 40 baseball cards and 10 football cards. Therefore his total number of cards is given as 40 + 10 which is 50.
The fraction of his cards which are baseball cards only is calculated as
Baseball cards = 40/50
Baseball cards = 4/5
Converting 4/5 to a decimal (which can equally be done with a calculator) gives you 0.8
Hence, the part of his entire card collection that can be represented by baseball cards is 0.8