which statements describe an object in motion that has no external force acting on it? check all that apply.

What is the missing step in this proof? scroll down to see the entire proof.u

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.

What is 7/81 as a percentage? round your answer to the nearest tenth of a percent.