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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11. 80c^5d^6

12. 20r^5s^3

13. -3a^3b^2

14. 8xy^5

15. -12m^3n^3

rick has $1400 and sally has $1500

step-by-step explanation:

to find amount of money rick has after 10 years :

principal = $1000 , time = 10 years , rate = 4% annually

to find amount of money sally has after 10 years :

her friend gives to pay her $50 per year, therefore money she has after 10 years = 50 × 10 = $500

also, sally gets $1000 after 10 years,

therefore, total amount of money sally has after 10 years = 500 + 1000 = $1500

so, after 10 years : rick has $1400 and sally has $1500