Question

approximately 102.4 million passengers passed through a certain airport in 2019. because of the coronavirus pandemic, only 42.1 million passengers passed through the same airport in 2020. express these quantities in passengers per hour.
convert from passengers per year to passengers per hour by using a chain of conversions. which conversion factors should be used? select all that apply.
a. $\frac{365 \text{ days}}{1 \text{ yr}}$ b. $\frac{24 \text{ hr}}{1 \text{ day}}$ c. $\frac{1 \text{ day}}{24 \text{ hr}}$ d. $\frac{1 \text{ yr}}{365 \text{ days}}$
express the 102.4 million passengers that passed through the airport in 2019 using scientific notation.
102.4 million =
(type your answer in scientific notation, using the appropriate symbol from the math palette for any multiplication.)

Explanation:

Step1: Recall scientific - notation rules

Scientific notation is of the form $a\times10^{n}$, where $1\leq|a|\lt10$ and $n$ is an integer.

Step2: Convert 102.4 million to standard form

1 million = $10^{6}$, so 102.4 million = $102.4\times10^{6}=1.024\times10^{2}\times10^{6}$.

Step3: Use the exponent - rule $a^{m}\times a^{n}=a^{m + n}$

$1.024\times10^{2}\times10^{6}=1.024\times10^{2 + 6}=1.024\times10^{8}$.

Answer:

$1.024\times10^{8}$