Researchers randomly choose two groups from 15 volunteers. over a period of 9 weeks, one group watches television before going to sleep, and the other does not. volunteers wear monitoring devices while sleeping, and researchers record dream activity. which type of study method is described in each situation? a. not enough information given b. survey c. observational study d. controlled experiment

Juliana says that she can use the patterns of equivalent ratios in the multiplication table below to write an infinite number of ratios that are equivalent to 6: 10. which statement explains whether juliana is correct? she is correct because she can multiply 6 and 10 by any number to form an equivalent ratio. she is correct because 6: 10 can be written as 1: 2 and there are an infinite number of ratios for 1: 2. she is not correct because the multiplication table does not include multiples of 10. she is not correct because 6: 10 is equivalent to 3: 5 and there are only 9 ratios in the multiplication table that are equivalent to 3: 5.

Over which interval is the graph of f(x) = x2 + 5x + 6 increasing?

Jayne is studying urban planning and finds that her town is decreasing in population by 3% each year. the population of her town is changing by a constant rate.true or false?