In a circle find the length of a 90° arc of the radius is 4.

How did different parts of the united states feel about slavery

Does anyone have some ideas for an herbalism or culinary project? i need to start my graduation project so i'm prepping for it

The graph shows a trend in an ecosystem over time caused by increased pollution in the region. what can you conclude from the graph? a. there’s lower biodiversity among birds. b. there’s a higher reproductive rate among birds. c. there’s a significant decline in the number of producers. d. other types of animals were unaffected by pollution.