A top is formed by fusing two identical right circular cones by their bases as shown at left. The height of the top, hhh, which is the distance between the two cone points, is 666 centimeters \text{(cm)}(cm)start text, left parenthesis, c, m, right parenthesis, end text. The diameter of the circular cone bases, ddd, is also 6\,\text{cm}6cm6, start text, c, m, end text. What is the volume of the entire object, in cubic centimeters?

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?