Lusia tiene $500, decide gastar el 15% de esta cantidad en la compra de un postre para despues de la comida ¿ A cuánto asciende la cantidad en pesos que dispone lusia para comprar el postre

Extra points! find the missing dimension! need asap

Scores on a university exam are normally distributed with a mean of 78 and a standard deviation of 8. the professor teaching the class declares that a score of 70 or higher is required for a grade of at least “c.” using the 68-95-99.7 rule, what percentage of students failed to earn a grade of at least “c”?

Which of the following parabolas opens up?