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Question
a bird flies down from a higher elevation to a lower elevation at a rate of 2 meters per second. which equation models the birds change in elevation, in meters, after 30 seconds? a. 30(-2) = 60 b. 30·2 = 60 c. 30(-2) = -60 d. (-30)(-2) = -60
Step1: Analizar el cambio de elevación
La elevación disminuye (bajada), así que la tasa es negativa: \( -2 \) m/s. El tiempo es 30 segundos.
Step2: Calcular el cambio de elevación
La ecuación es \( \text{tiempo} \times \text{tasa} = 30 \times (-2) \). Calculando: \( 30 \times (-2) = -60 \).
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C. \( 30(-2) = -60 \)