Anew cell phone cost $85, and the sales tax is 9%. what is the amount of the sales tax

The final cost of a sale is determined by multiplying the price on the tag by 75%. which best describes the function that represents the situation?

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.

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