Cierto grupo de caminantes recorrió 16 Km en cierto tiempo. Si su velocidad hubiera sido 1,6 Km/h más rápida, el recorrido habría tardado 20 minutos menos. ¿En cuánto tiempo se hizo el recorrido?

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step-by-step explanation:

hello,

b) 62.47% of the students are between 14 and 18 years old.

step-by-step explanation:

mean = 15 and standard deviation = 2

student between 14 to 18

formula used z-score

for age 14 , z score

using z-table , p(z> -0.5)=0.3085

for age 18 , z score

using z-table , p(z< 1.5)=0.9332

p(-0.5< z< 1.5)=0.9332-0.3085 = 0.6247

thus, 62.47% of the students are between 14 and 18 years old.

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a natural event such as a flood, earthquake, or hurricane that causes great damage or loss of life.

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