Density: Area & Volume

In 2018, Augusta had a population of 196,807. Augusta has a land area (not including water areas) of 306.2 square miles. What was the population density in 2018?

A circular petri dish has a radius of 3 cm. Sierra counts 95 bacteria in the petri dish when she examines it under a microscope. What is the density of the bacteria per square centimeter? (round to the tenths place, type in number only)

What is the density of a block of wood measuring 0.9 cm X 2 cm X 6 cm with a mass of 5.4g? (Round to the tenths place, type in numbers only)

Water has a density of approximately 1 g/cm³. Objects will sink if their density is greater that water and will float if their density is less. A cube measuring 2cm on each side weights 5g; will it sink or float?

A spherical balloon with a 10" diameter is filled with 0.3 grams of helium. What is the density of helium in the balloon? Round to the hundred thousandths, type number only