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 ​

The random variable x is the number of occurrences of an event over an interval of ten minutes. it can be assumed that the probability of an occurrence is the same in any two-time periods of an equal length. it is known that the mean number of occurrences in ten minutes is 5.3. the appropriate probability distribution for the random variable

Scrub a dub toothbrushes are $4.00 each. there is a 10% discount, but there is also a 6% sales tax after the discount is applied. what is the new price after tax? round to the nearest penny

Acyclist bike x distance at 10 miles per hour .and returns over the same path at 8 miles per hour.what is the cyclist average rate for the round trip in miles per hour ?