What’s the unit rate for 228 students in 12 classes

Which of the following is the shape of a cross section of the figure shown below

You buy five cds at a sale for $5.95 each. write an expression for the total cost of the cds. then use the distributive property and mental math to evaluate the expression.

What is the name of a polygon that has four congruent sides and theses angle measures 60,120,60,120?