Directions:Use the product rule to simplify the following monomials.
11.) 8c²d • 10c³d⁵
12.) -4(rs²)(-5r⁴s)
13.) (-6a²b) • (1/2ab)
14.) 12y • (2/3xy⁴)
15.) 1/4 (8mn) • (-6m²n²)

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