you just bought a new iphone for $999.the tax is 9% of the cost. how much did you pay in total with taxes?

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.

Pls yall i really need the answer fr fr

Petes dog weighed 30 pounds it then lost 16% of it's weight how much did pete lose