There are 20 students on the school's student council. a special homecoming dance committee is to be formed by randomly selecting 6 students from student council. how many possible committees can be formed?

720
38,760
27,907,200

Pyotr tchaikovsky sporting goods operates on a 45% overhead based on the selling price, which results in an overhead of $65.34 on the newest version of an air hockey game set. if the air hockey game set costs pyotr tchaikovsky sports $49.32, find the selling price, the markup, and the net profit.

Prove that the value of the expression 7^8–7^7+7^6 is divisible by 43.

The function v(r)=4/3pir^3 can be used to find the volume of air inside a basketball given its radius. what does v(r) represent