The image below was obtained during an abdominal ultrasound exam of a 57-year-old patient in the ICU. The patient has no history of gallbladder disease. The abnormality is most likely:  

The image demonstrates what indicated by the arrow?

Use a truth table to determine if ∨ (r → p) is a tautology. (Create a truth table for full credit.  You can create one here or upload a scan of your TRUTH TABLE into question 22 for full credit.) 

Which equivalence is illustrated by (p ∨ q) ↔ ~(~p ∧ ~q)

a) Symbolize the statement “If I save a little money each week, then I can buy a car.” Then express the b) inverse symbolically and English,c) converse  symbolically and English, and d) contrapositive symbolically and English.

Determine how many rows will be in the truth table for the following statement.~(p ∧ q) ∧ (q ∨ ~r)

Determine whether the statements are logically equivalent.~(p ∧ q) and ~p ∧ ~q

Answer true, false, or cannot be determined: Suppose r is false. Then what is the truth value of the statement ~(p ∨ ~r ) → (r ↔ w)? (Upload a scan of your work as one pdf into the last question for full credit.)

By what mechanism do ACE inhibiters decrease blood pressure?

Place the following lipoproteins in order of highest lipid content (least dense) to highest protein content (most dense).  1 = Least dense (highest lipid content); 4 = Most dense (highest protein content).