José es un artesano manabita que elabora sombrero de paja taquilla para terminarlos necesita ponerles una cinta como adorno. Compra una cinta de 183,6cm el contorno de cada sombrero es de 30,2cm necesita saber para cuantos sombreros le alcanza la cinta que compró. Además si el metro de cinta cuesta $2,35 ¿Cuantó dinero invirtió en el adorno de cada sombrero? Ayudenme plis, gracias :)

Stu and ambrose are working together on a study of whether diet is related to students' mental health. first, they randomly select 10 students from the student center and 10 students from the office of counseling and psychological services. then, they ask students to rate their diet in terms of healthiness on a scale of 1-100 before completing a 20-item mental health survey. a) name one of the constructs being studied b) how was the construct you named above operationally defined in this experiment? e) was the variable you described above their independent variable, their dependent variable, or a controlled variable? d) what is a confounding variable? what is a potential confound in this study?