What is the product? open paren 7 x squared y cubed close paren times open paren 3 x to the 5th power y to the 8th power close paren

Multiply the coefficients: 7 × 3 = 21. For like bases, add the exponents: x² × x⁵ = x⁷ and y³ × y⁸ = y¹¹. The product is 21x⁷y¹¹, choice D.

AI-written and checked against the verified answer.