B. Óptica. Una fórmula que se utiliza en el estudio de la óptica es: f=
(p-1+q-1)-1
donde p es la distancia del objeto respecto de una lente, q es la distancia de la imagen
respecto de la lente y fes la longitud focal de este. Expresa el lado derecho de la fórmula
sin exponentes negativos.

1. why is a frequency distribution useful? it allows researchers to see the "shape" of the data. it tells researchers how often the mean occurs in a set of data. it can visually identify the mean. it ignores outliers. 2. the is defined by its mean and standard deviation alone. normal distribution frequency distribution median distribution marginal distribution 3. approximately % of the data in a given sample falls within three standard deviations of the mean if it is normally distributed. 95 68 34 99 4. a data set is said to be if the mean of the data is greater than the median of the data. normally distributed frequency distributed right-skewed left-skewed