Analyze the following arguments and tell whether they are valid and sound:
1) 1. if missy is a cat , then she is a mammal.
2. missy is not a mammal.
3. therefore, missy is not a cat.
2) 1. if fido is a dog, then he is a mammal.
2. fido is a dog.
3. therefore, he is a mammal.
3) 1. if fido is a dog then he is a mammal.
2. fido is not a dog.
3. therefore, fido is not a mammal.

Mr. mann's science students were experimenting with speed. they set up a 1 meter (100 cm) track. the students used balls instead of cars. the balls were different sizes and made of different materials. four at a time, students rolled balls around the track to see which had the fastest and slowest speeds. some of their data are shown in the table. which ball will take the longest to complete one lap around the track?

What were the nuremberg laws? who did they target and how? list 3 ways people were targeted by the nazis.

What period of history refers to the time when people did not have written records