Help me with my math questions

Np4=12np2 with clear explanation.

Fredrick designed an experiment in which he spun a spinner 20 times and recorded the results of each spin

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.