Question

(a) translate the argument into symbolic form and (b) determine if the argument is valid or invalid. You may compare the argument to a standard form or use a truth table.
If I can get my child to preschool by 9:45AM, then I can take the 9:00AM class.
If I can take the 9AM class, then I can be done by 2PM
If I can get my child to preschool by 8:45AM then I can be done by 2PM

Answer 1

p -> q
q -> r
p -> r

valid

Answer 2

p_>r

Answer 3

20 x 20 = 100

Answer 4

400