For a convention at a luxury hotel, rooms cost $1600. per night when 90 rooms are rented. For every extra room over 90, the price is reduced by $10 per room. How manly extra rooms should the hotel rent to maximize the revenue for the hotel? A) 20 B) 25 C) 30 D) 35 ​

Need now max recorded the heights of 500 male humans. he found that the heights were normally distributed around a mean of 177 centimeters. which statements about max’s data must be true? a) the median of max’s data is 250 b) more than half of the data points max recorded were 177 centimeters. c) a data point chosen at random is as likely to be above the mean as it is to be below the mean. d) every height within three standard deviations of the mean is equally likely to be chosen if a data point is selected at random.

At noon a tank contained 10cm water. after several hours it contained 7cm of water. what is the percent decrease of water in the tank?

What ratio is proportional to 18/21