2. The Turner family uses 548 liters of water per day. The Hill family uses 3 times as much water How much water does the Hill family use per week?

The polynomial is a trinomial \( -7 k+7 k^{3}+3 k^{4} \) The degree of this polynomial is \( \square \).

A biologist recorded the population growth of two species of frogs in a pond area starting in 2010 . The first species started with 42 frogs and increased by 6 frogs per year. The second species started with 30 frogs and increased by 8 frogs per year. A. Write an equation modeling equal populations of the frogs \( t \) years after 2010. B. In what year were the populations of the two groups of frogs equal?

Perform the operation and simplify, if possible. \[ \frac{4 x^{2}-12 x y+9 y^{2}}{x^{3} y^{2}} \cdot \frac{x^{3} y}{4 x^{2}-9 y^{2}} \]

Find the quotient by replacing the divisor by its reciprocal and multiplying. \( \frac{14}{5} \cdot \frac{3}{4} \div \frac{9}{10}=\square \)

2. Lámpara incandescente Problema: Una lámpara de 60 W (vatios) funciona a 120 V (voltios). ¿Cuál es la resistencia de la lámpara? - Ayuda: Recuerde que la potencla (P) de la lámpara es 60 W . y que I = PN