Which data set has the greatest spread for the middle 50% of its data?
a.
{18, 13, 22, 17, 21, 24}
b.
{17, 19, 22, 26, 17, 14}
c.
{13, 17, 12, 21, 18, 20}
d.
{18, 21, 16, 22, 24, 15}
i need more it's confusing a little bit

Find the value of the cosine for angle a

Jabari is power washing houses for a summer job. for every job, he charges an initial fee plus $30 for each hour of work. his total fee for a 4 -hour job, for instance, is $170 . jabari's total fee, f, for a single job is a function of the number, t, of hours it takes him to complete the job. write the function's formula.

An appliance store sells lamps at $95.00 for two. a department store sells similar lamps at 5 for $250.00. which store sells at a better rate