Abiologist created the following graph to show the relationship between the temperature of water (x), in degrees celsius, and the number of insect larvae (y) in the water:

graph of y equals minus 2 times the square of x plus 20 times x plus 400

what do the x-intercepts of the graph represent? (1 point)

there were 20 larvae at 0 degrees celsius.
there were 10 larvae at 0 degrees celsius.
the water has no larvae at −10 degrees celsius and 20 degrees celsius.
the water has maximum larvae at −10 degrees celsius and 20 degrees celsius.

Agroup of student volunteers participates in a study designed to assess several behavioral interventions for improving output in a repetitive task. prior to the beginning of the study, all volunteers unknowingly observed, and their output is measured. at the beginning of the study, prior to any intervention, the volunteers perform the same task under the observation of a study administrator, and their overall output increases. which of the following terms describes this phenomenon? a. simpson's paradox b. hawthorne effect are d. novelty effect d. pygmalion effect e. observer-expectancy effect