1.-El espejo parabólico del telescopio Hale en el Observatorio Palomar, tiene un diámetro de 200 pulgadas en la parte más ancha y una profundidad aproximada en el centro de 4 pulgadas.
A)Determine la distancia del vértice al receptor de imágenes.
B)Encuentre una ecuación de la parábola que forma el espejo.

1- what do you think the product of a nonzero rational number and an irrational number is? is it rational or irrational? make use of variables, the closure property of integers, and possibly a proof by contradiction to prove your hypothesis.2- why do we have to specify that the rational number must be nonzero when we determine what the product of a nonzero rational number and an irrational number is? if the rational number were 0, would it give us the same result we found in the first question?