Round 199.532 to the nearest n tenth

Inez has a phone card. the graph shows the number of minutes that remain on her phone card a certain number of days.

Weekly wages at a certain factory are normally distributed with a mean of $400 and a standard deviation of $50. find the probability that a worker selected at random makes between $450 and $500

You have 12 balloons to blow up for your birthday party. you blow up 1/3, and your friend blows up 5 of them. what fraction of the baloons still need blowing up