Is anyone here good at calculus I’m willing to pay.

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.

Use sigma notation to represent the following series for 9 terms.

Gabrielle's age is two times mikhail's age. the sum of their ages is 84. what is mikhail's age?