Final answer:
Total revenue is the income generated from selling products, calculated by multiplying the price by the quantity sold. The revenue equation for the PTA selling t-shirts is r(s) = -0.1552 + 30s, where s is the number of t-shirts sold.
Step-by-step explanation:
Total revenue is the income generated from selling products. It is calculated by multiplying the price of the product by the quantity of output sold. In the case of the PTA selling t-shirts, their revenue equation can be represented as r(s) = -0.1552 + 30s, where s is the number of t-shirts sold. To find the revenue for a specific number of t-shirts, plug in the value of s into the equation and solve.