A wildlife reserve has a population of 70 elephants. A group of researchers trapped 30 elephants and recorded their vital statistics. Of the trapped elephants, 24 were female. If that rate holds true for the entire population of 70 elephants, how many female elephants are on the wildlife reserve?
A. 56
B. 204
C. 100
D. 216

If square root x = -7, then x= -49 true or false

Given right triangle a w/a hypotenuse length of x+4 and a leg of x, and right triangle b, w/ a hypotense length of 3y and a leg length of y+4 for what values of x and y are the triangles congruent by hl?

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?