A group of students measured a ten-square-meter section of a pond ecosystem and recorded observations. If the students wanted to design an experiment based on their observations, which would be a testable hypothesis? (this is environmental science)

The graph of a function f(x)=(x+2)(x-4). which describes all of the values for which the graph is negative and increasing? all real values of x where x< -2 all real values of x where -2

Bella want to know what the students at her school think of her show. which is the best group to survey to find this information a. go to the mall and ask all of the students she recognizes from school b. ask her viewers to call in durning an episode of the show c. get a list of students at her school from the office and use a random number generator to pick 30 of them d. get a list of students at her school from the office and pick the first 30 students on the list

Heather is riding a quadratic function that represents a parabola that touches but does not cross the x-axis at x=-6