1. How many ways are there to make an octagon with 19 different sticks when order doesn’t matter?

The general form of the quetion of a circle is ax^2+by^2+cx+dy+e=0 where a=b=0 if the circle has a radius of three units and the center lies on the y axis which set of values of a, b, c, d, and e might correspond to the circle

Average acceleration: i have no idea how to do this.

Find the number of liters in 12.8 gal of gasoline. round to the nearest hundredths