a slice of bread weighs 28.349 grams. Which expression shows the weight of a slice of bread in expanded notation?

An air conditioning system can circulate 350 cubic feet of air per minute. how many cubic yards of air can it circulate per minute?

In a graph with several intervals o data how does a constant interval appear? what type of scenario produces a constant interval?

He mass of a single atom of carbon can be found by dividing the atomic mass (12.01 g) by 6.022 x 10^23. which is the mass of a single carbon atom, correctly written in scientific notation with the correct number of significant figures?