Tasty treats baking company asked a random sample of 100 students in the senior class at ridgemont high school the question, “do you prefer chocolate or butterscotch tasty treats? ” everyone surveyed had to pick one of the two answers, and 42%, percent said they preferred chocolate. based on this data, which of the following conclusions are valid? choose 1 a) about 42%, percent of all students at ridgemont high prefer chocolate. b)about 42%, percent of all students in the senior class at ridgemont high prefer chocolate. c)42%, percent of this sample preferred chocolate, but we cannot conclude anything about the population.

B!!

Step-by-step explanation:

Answer a is incorrect because only the seniors were questioned and answer c is incorrect because nothing was mentioned in the question about only testing males.

Your answer is B

la parábola es el lugar

geométrico en el cual los puntos tienen una distancia idéntica, equidistantes,

de un punto denominado foco, f, y una recta denominada directriz

el radio vector de una

parábola es el segmento que existe entre un punto cualquiera y el foco.

por la ecuación se observa

que la parábola abre hacia la derecha, por lo cual podemos usar las siguientes fórmulas

la ecuación ordinaria de la

parábola es y^2 = 4px, donde p es la longitud desde el vértice de la parábola al

foco.

la fórmula de la directriz

es x + p = 0

resolviendo:

y^2-9x = 0

y^2 = 9x

4p = 9, entonces p = 9/4

entonces el foco tendrá la

coordenada f(9/4,0)

la directriz vendrá

expresada por

x + p = 0

x = -p

x = -9/4

el problema indica que la

ordenada es igual a 6, entonces

(6)^2=9x

x = 36/9

x = 4

entonces el punto al cual

hay que obtener la distancia será p(4,6)

calculando se tendrá: pf = 

pf = 6,25 u

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step-by-step explanation: