Please help me đáp án của nó là gì help me thanks you very much

If chord ab is congruent to chord cd, then what must be true about ef and eg?

Someone me what is the area of this figure? 18m 18m 8m 16m

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.