Una ciclista , a 12 km/h , cubre cierto recorrido en 5 minutos . ¿ Cuanto tardará , en el mismo recorrido , una persona que camina a 4km/h?

He concluded that a heavier object dropped from the same height as a lighter object will land

What are the sotions to the quadratic equation 9x^2=4

He weights of 2-pound bags of best dog food are approximately normally distributed with a given mean  and standard deviation  according to the empirical rule, what percentage of the bags will have weights within 3 standard deviations of the mean? 47.5%68%95%99.7%