40 POINTS PLATO

Monica built a remote-controlled, toy airplane for a science project. To test the plane, she launched it from the top of a building The plane traveled a horizontal distance of 50 feet before landing on the ground. A quadratic function which models the height of the plane, in feel, relative to the grouna, at a horizontal distance of x feet from the butiding is shown.

Since the domain represents the airplane while it was in the air, the value of the domain should be restricted to the interval(,)

Space 1

A. the maximum height of

B. the horizontal distance covered by

C. all the heights in the trajectory of

Space 2

A.-10

B.125

C. negative infinity

D.0

Space 3

A. Infinity

B.50

C.125

D.225

In a study of the relationship between socio-economic class and unethical behavior, 129 university of california undergraduates at berkeley were asked to identify themselves as having low or high social-class by comparing themselves to others with the most (least) money, most (least) education, and most (least) respected jobs. they were also presented with a jar of individually wrapped candies and informed that the candies were for children in a nearby laboratory, but that they could take some if they wanted. after completing some unrelated tasks, participants reported the number of candies they had taken. it was found that those who were identiď¬ed as upper-class took more candy than others. in this study, identify: (a) the cases, (b) the variables and their types, (c) the main research question, (d) identify the population of interest and the sample in this study, and (e) comment on whether or not the results of the study can be generalized to the population, and if the ď¬ndings of the study can be used to establish causal relationships.

Rounded to the nearest tenth, what is the value of x

Write the factored form of this trinomial 9x^2+18x-7