An amphitheatre has 23 seats in the first row, 25 in the second, 27 in the third, and so on, for 32 rows. How many seats are in the amphitheatre? The amphitheatre has seats​

The distance of a chord from the centre of a circle is 12cm and the lenght of the chord is 10cm. find the radius of the circle

Monitors manufactured by tsi electronics have life spans that have a normal distribution with a standard deviation of 1800 hours and a mean life span of 20,000 hours. if a monitor is selected at random, find the probability that the life span of the monitor will be more than 17,659 hours. round your answer to four decimal places.

There were 25 students who answered to a survey about sports. four-fifths of them like football. how many students like football?