Question 198532
The symbol "v" means "or", the symbol "~" means "not", and the symbol "->" means "if...then"


Example: "p v q" means "p or q"


Example: "~p" means "not p"


Example: "p -> q" means if "p, then q"



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Since "q: April is in the car.", this means that 


~q: April is NOT in the car.




Also, because "r: Stan is at the zoo. ", this means that 


~r: Stan is NOT at the zoo


Now join the last statement with an "or" and connect it to "Mary is on the bus" to get


p v ~r: Mary is on the bus OR Stan is NOT at the zoo





Now attach the last phrase to "April is NOT in the car" using an "if..then" to get



(p v ~r) -> ~q: IF Mary is on the bus OR Stan is NOT at the zoo, THEN April is NOT in the car.



Note: the all caps words are used for emphasis to point out the key words.