The cost(c)of chicken varies directly as its weigth(w)equation​

5,678.321 what place value is the 1 in

Me because i don't understand how to do it.: )

The base of pyramid a is a rectangle with a length of 10 meters and a width of 20 meters. the base of pyramid b is a square with 10-meter sides. the heights of the pyramids are the same. the volume of pyramid a is the volume of pyramid b. if the height of pyramid b increases to twice that of pyramid a, the new volume of pyramid b is the volume of pyramid a.