James collects the lengths of some animals and records the data in the table below.
Length (x cm) Frequency
15 < x < 20 1
20 < x < 25 5
25 < x < 30 3
Find the mean of the data in the table.
Give your answer correct to 1 decimal place where appropriate.​

Xto the second power plus 14x plus 48. what are the factors? we are doing factoring trinomials with a=1

Pyramid shown has a square base that is 18 inches on each side has a surface area of 164 square inches what is the slant height

Two groups of students were asked how many hours they spent reading each day. the table below shows the numbers for each group: group a 1 2 1 1 3 3 2 2 3 group b 3 2 3 2 2 2 1 1 2 based on the table, which of the following is true? the interquartile range for group a students is 0.5 less than the interquartile range for group b students. the interquartile range for group a students is equal to the interquartile range for group b students. the interquartile range for group a employees is 0.5 more than to the interquartile range for group b students. the interquartile range for group a employees is 1 more than the interquartile range for group b students.