Express the area of the triangle as a monomial

Anyone? 15m is what percent of 60m; 3m; 30m; 1.5 km?

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.

Is triangle jkl congruent to triangle rst? if so, what is the scale factor?