What is the most likely explanation for why the wooly mammoth went extinct? 

Write the negation of, “You’re late and the bus was late.”

Translate the following sentence into its logical form:  “If John passes the class then he worked hard and came to class on time.”

Suppose you’re told that, “You were divorced and you made joint estimated tax payments with your former spouse or you changed your name and you made estimated tax payments using your former name.” If you know that: You didn’t get divorced. You didn’t make joint tax payments with your former spouse You did change your name You did make estimated tax payments using your former name. Do those values make the original statement true or false?

How would you define a mathematical statement?

Translate the following argument into its logical form and then determine if it’s valid either by referencing a valid logical form that it matches or writing its truth table. If your watch stops then you’ll be late. You weren’t late. —————————————————————————— Therefore, your watch didn’t stop.

The ability of the heart to beat is intrinsic or built in. 

What is the name of the indicated part of the EKG diagram?

When Na+ gates open in a cardiac muscle cell, Ca2+ also enters the cell. 

Match the structures of the intrinsic conductoin system to the correct structures.