John buys a toy plane from a toy store. the money he pays the store (a. does not affect), (b. is injected back into), (c. leaks out from) the economy through (a. the employees' wages), (b. the importation of new toys), (c. the sales of similar toys) and the taxes paid by the store.

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.

What important race leader of the early twentieth century is being described?

What impact does geography have on where people live in brazil?