Acompany has introduced two new products to the market. the revenue generated by product a was $63,000 in the first year, and the revenue increases by 3.5% every year. the revenue generated by product b was $81,000 in the first year, and the revenue increases by 2.1% every year. which function can the company use to determine its total revenue from the two products, r(x), after they have been on the market for x years, and approximately what will be the revenue generated by sales of the products after 6 years?