Need help ASAP

What is the common ratio for f(x)=2^x-3+5

Complete the solution of the equation. find the value of y when x equals to 28 x+3y=28

Find the arc length of the semicircle. 7the grade

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?