Use the following data sets to answer the question.
set b: {9,30,12,3,16,11,18}
set b: {9,30,12,3,16,11,18}

which statement about the shape of the data is true?
a. both sets have the same median, but set b has a larger mean.
b. set a has a lower median but a higher mean than set b.
c. both sets have the same median, but set a has a larger mean.
d. set b has a larger mean and median than set a.

99 points at a zoo, the leopard pen has a ring-shaped sidewalk around it. the outer edge of the sidewalk is a circle with a radius of 12 m. the inner edge of the sidewalk is a circle with a radius of 8 m. (1 point for showing all of your work) a. write and simplify an expression for the exact area of the sidewalk. (1 point for the answer) b. find the approximate area of the sidewalk. use 3.14 to approximate π. (1 point for the answer)

Last saturday, the museum box office sold 281 tickets for a total of $3,954. adults ticket cost $15, and students ticket cost $12. how many of each kind of tickets were sold?

In trapezoid efgh, m∠hef=(4x2+16)∘ and m∠gfe=(5x2+12)∘. find the value of x so that efgh is isosceles.