Which measure of center would you use to describe a data set with no extreme values and no big gaps?

The square pyramid has a volume of 441 cubic inches. what is the value of x? 1/7x is the height x is the base

How many solutions does the nonlinear system of equations graphed below have?

Acollection of coins has value of 64 cents. there are two more nickels than dimes and three times as many pennies as dimes in this collection. how many of each kind of coin are in the collection?