Which of the following data sets is bimodal?

a.
{23, 43, 43, 46, 43, 28, 12, 28, 28}

b.
{23, 45, 23, 13, 46, 12, 25, 37, 35}

c.
{21, 24, 22, 32, 39, 56, 12, 42, 42}

d.
{23, 35, 23, 23, 45, 23, 38, 50, 45}

The dance committee of pine bluff middle school earns $72 from a bake sale and will earn $4 for each ticket they sell to the spring fling dance. the dance will cost $400 write an inequality to determine the number, t of tickets the committee could sell to have money left over after they pay for this year's dance. what is the solution set of the inequality?