Domain in interval notation please

What is the exact volume of the cylinder (radius 13 in., height 30 in.)

How can the correlation in the scatter plot graph below best be described? positive correlation negative correlation both positive and negative no correlation

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.