Precalc please help!!

Is it true that product of 3 consecutive natural numbers is always divisible by 6? justifyyour answer

The parabola opens: y=√x-4 (principal square root) up down right left

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.