Help me please! :( I don't know what to do so it would mean the world to me if anyone could help!
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The multiplication property of zero states that the product of any number and 0 is 0. what must be true about either a or b to make ab=0

Brent wants to know what is 5 x 1/2

Tom and lilly rented a house for $12,000 last year. at the start of the year they bought the house they had been renting directly from the owner for $250,000. they believe they could rent it for $12,000 this year, but stay in the house. how much does tom and lilly’s decision to buy the house change gdp? a. it reduces gdp by $12,000 b. it does not change gdp c. it raises gdp by $238,000 d. it raises gdp by $250,000