I need help with this

At a sale this week, a desk is being sold for $213. this is a 29% discount from the original price. what is the original price?

You eat $0.85 for every cup of hot chocolate you sell. how many cups do you need to sell to earn $55.25

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)