Mrs. Foster is making a ribbon garland for her baby’s nursery. She buys 650 centimeters of pink ribbon, 3 meters 70 centimeters of gray ribbon, and 480 centimeters of white ribbon. How many meters of ribbon did Mrs. Foster buy?

Which of the following ideas did greek philosopher democritus contribute to the atomic theory? a. each object is made up of one atom, which varies in size from very small to very large. b. matter is composed of only one kind of particle, which can be easily destroyed. c. every element has a specific type of atom, which remains the same size in all forms of matter. d. all matter is composed of small particles, which combine to make larger objects.