Francesca tried to evaluate an expression. Here is her work: 3(5)2–18÷3
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3(25)–18÷3 Step 1
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75–18÷3 Step 2
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57÷3 Step 3
=
19 Step 4
Is Francesca's work correct?

Television viewing reached a new high when the global information and measurement company reported a mean daily viewing time of 8.35 hours per household. use a normal probability distribution with a standard deviation of 2.5 hours to answer the following questions about daily television viewing per household. a. what is the probability that a household views television between 4 and 10 hours a day? (to 4 decimals) b. how many hours of television viewing must a household have in order to be in the top 7% of all television viewing household? (to 2 decimals) c. what is the probability that a household views television more than 4 hours a day? (to 4 decimals)