A public health organization is conducting a survey to estimate the percentage of adults in a large town who regularly exercise. Out of 600 randomly selected adult residents in this town, 450 reported that they engage in regular exercise. Using a \( 90 \% \) confidence level, compute a confidence interval estimate for the true proportion of adults in this town who exercise regularly.

What is the slope of the line that contains the points \( (-1,9) \) and \( (5,21) ? \)

3) The all factors of 16 are factors of 16 is .............

80 Rappresenta nel piano cartesiano i punti \( A(5 ; 3), B(12 ; 3) \) e \( C(6 ; 8) \). Calcola l'area del triangolo \( A B C \).

The legs of a right triangle measure 8 inches and 12 inches. What is the area of the triangle?

3. En un \( \triangle A B C \) isósceles de base \( B C \), se trazan las bisectrices de los ángulos \( \angle B \) y \( \angle C \), las cuales se cortan en \( I \). Probar que el \( \triangle B I C \) es isósceles.