Professor Simpson is interested if time spent studying is affected by the color of a room. She randomly assigns her students into four groups and has each group study in a room that has been painted a different color (red, yellow, green, or white). Professor Simpson then measures the number of minutes that each group spends studying. What is the independent and dependent variable in this study?
The color of the rooms

The number of minutes each group spends studying

The average score each group gets on their first exam

The age and gender of the students in each group

IV: colour of the room

DV: The number of minutes each group spends studying

Step-by-step explanation:

IV(Independent Variable) : is what is changed in the experiment and the colour of the room is being changed.

DV(Dependent Variable) : is what is measured in the experiment and the number of minutes in spent on studying is measured.

i dont know sorry

step-by-step explanation:

the correct option is 2.

step-by-step explanation:

according to the given information triangle abc is a right angle triangle with right angle at a. segment ab is 5 and segment ac is 7. point d is on segment bc and angles adb and adc are right angles.

it is given that triangles abd, cad, and cba are similar.

two triangles are similar if their corresponding sides are proportional.

in triangle cba, using pythagoras theorem

                      )

triangle abd and cba are similar,

                            (2)

triangle cad and cba are similar,

                      )

using (1), (2) and (3), we get

hence proved.

therefore option 2 is correct.