HELP QUICK which of the following numbers are rational

[15 points, algebra 2]simplify the complex fraction and find the restrictions.

If private savings 'v' = 0.75s and total savings 's' equals $4.20 billion, solve for public and private savings.

Asmall business produces and sells balls. the fixed costs are $20 and each ball costs $4.32 to produce. each ball sells for $8.32. write the equations for the total cost, c, and the revenue, r, then use the graphing method to determine how many balls must be sold to break even.