Ariel is heading to school from home, 1 block away from school she stops to check for IR book and realized she left it home. Ariel turns around and heads back how for her book. Which graph accurately displays Ariel’s journey to school? In full detail, describe the difference between a balanced force and an unbalanced force?

It will fall off and tip over. 

13) a 14) a15) b16) i don't know sorry17) a (maybe)

There is no reason to think the results are biased or not conducted properly but you should not assume the results are correct just because they were done in a laboratory so the answer would be c. it is likely to be reliable because the results support the conclusion presented.

The population of unionid mussels decreased after zebra mussels were introduced. zebra mussels competed with the unionid mussels for food. the zebra mussels were able to displace the unionid mussels, allowing the zebra mussel population to increase  over the years. the unionid mussel population decreased because  of lack of food.