Paco went out for breakfast. the bill came to $8.21. he wants to leave a tip that is 20% of the bill. about how much should he leave for tip ? a: $0.80 b. $1.60 i'm not in college this is 5th grade math i put 50 points because i'm a savage like that xd answer

Becca wants to mix fruit juice and soda to make a punch. she can buy fruit juice for $3 a gallon and soda for $4 a gallon. if she wants to make 28 gallons of punch at a cost of $3.25 a gallon, how many gallons of fruit juice and how many gallons of soda should she buy?