Math 8 U7 Post Review

Which expression has the same value as $$\left(\frac{2}{3}\right)^3$$ ?

Which of the following is equivalent to $$\frac{3^5\times5^4}{3^3\times5^2}$$ ?

A certain star was found to be 5 000 000 000 000 light years away from Earth. Which value is its equivalent in scientific notation?

The population of Town A is about $$2\times10^{32}$$ and that of Town B is $$4\times10^{26}$$ . About how many times greater is the population of Town A than Town B?

What is $$7.673\times10^{-5}$$ equivalent to in standard form?

How many times is $$6.5\times10^{15}$$ larger than $$1.3\times10^{12}$$ ?

Examine the expression $$\left(5\times10^4\right)\cdot\frac{3\times10^{-2}}{0.006}$$ ?

The expression $$\left(2.5\times10^4\right)\left(4\times10^{12}\right)$$ involves scientific notation. Which of the following is its value when simplified?

A large container can hold $$2\times10^2$$ gallons of water. A pond near your house holds $$6\times10^{13}$$ gallons of water. How much more water does the pond contain compared to the container?

The number of people who own a social media account in Smile City is represented by the expression $$1\times10^6$$ while those in Jolly City is about $$4\times10^5$$ . Approximately how many times larger is the number of social media owners in Smile City than those in Jolly City?