Kiera wanted to find the approximate number of historical books at the library she works at. she used the computer to randomly take a sample of 80 books and found that 6 of them were considered historical books. there are 21,360 books at this library. what is the best estimate of the amount of historical books at this library? a)1282 b)2136 c)17088 d)1602

Aswimming pool measures 22ft by 12ft and is 4ft deep. if the pool is being filled at 2.5 cubic ft per minute, how long will it take to fill the pool?

Type the correct answer in each box. use numerals instead of words. if necessary, use / fir the fraction bar(s). the graph represents the piecewise function: h

Type the correct answer in each box. use numerals instead of words. the average number of subscribers to an online magazine each year from 2010 to 2015 is given in the table below. the average number of subscribers to the online magazine in 2010 was the percent increase in the average number of subscribers in 2011 to the average number of subscribers in 2012 was %. the maximum average number of subscribers to the online magazine in the years shown was