The stack on the left is made up of 15 pennies, and the stack on the right is also made up of 15 pennies. if the volume of the stack of pennies on the left is 390 mm3, what is the volume of the stack of pennies on the right in cubic millimeters? (hint: only enter numerals in the answer blank) two stacks of pennies are shown. the stack of pennies on the left form a right cylinder while the stack of pennies on the right form a free form cylinder like shape. numerical answers expected!