Urgent

find a ∩ b if a = {3, 6, 9, 12} and b = {2, 4, 6, 8, 10, 12}.
{24, 48}
{6, 12}
{2, 3, 4, 6, 8, 9, 10, 12}

Ametalworker has a metal alloy that is 30? % copper and another alloy that is 55? % copper. how many kilograms of each alloy should the metalworker combine to create 90 kg of a 50? % copper? alloy?

9/10 divide by -3/15 as a mixed number

Which statements are true about box plots? check all that apply. they describe sets of data. they include the mean. they show the data split into four parts. they show outliers through really short “whiskers.” each section of a box plot represents 25% of the data.