Para alimentar a mi mascota compre una bolsa de 30 kg de alimento al día siguiente gaste 2/5 de ella y tres días después gasté 1/3 de lo que me quedaba ¿ cuantos kg me quedaron ?

Can someone me with the property questions for 12 13 and 14 plz

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%

Rewrite the following quadratic functions in intercept or factored form. show your work. y = 4x^2 - 19x- 5