File an experiment to find the relationship between the angle at which a ray of light strikes a mirror and the angle at which the mirror reflects the light she placed a ray box in front of a mirror she change the angle at which the light from the ray box struck the mirror and noted the cross ponding angle at which the mirror reflecting the light which of the following is the independent variable in this experiment 1. The mirror used to reflect light
2. The ray box used as the source of light
3 angle at which the light from the ray box strike the mirror
4. Angle at which the mirror reflects the white from the Ray box

Correct the sentence alice who lived next door goed to a different school

According to the federal regulations, which of the following studies meets the definition of research with human subjects? a study of twenty 4th grade classrooms in which researchers ask the schools to systematically vary the time of day reading is taught, and collect weekly assessments of reading comprehension for each child over a three-month period.the collection of data, by a playground designer hired by the superintendent of schools, about the physical dimensions of school playgrounds, presence of fencing, and the kinds of equipment currently provided.a feasibility study for implementing a year-round school program, focusing on economic issues such a facilities utilization and transportation costs.an analysis of aggregate data comparing statewide high school graduation rates provided by the state department of public instruction, using county tax information.

Astudent answers 86 problems on a test correctly and receives a grade of 98% how many problems were worth the same number of points