Answer:
920000 or 9.2 x 10⁵
Explanation:
Given:
- It takes the sun 2.3 x 10⁸ years to orbit the milky way
- It takes Pluto 2.5 x 10² years to orbit the sun
Given this we want to find :
- How many times pluto orbits the sun over the time span that the sun makes one orbit around the milky way
To get this we must divide the time it takes Pluto to orbit the sun by the amount of time it takes the sun to orbit the milky way
In other words our answer = 2.3 x 10⁸ / 2.5 x 10² = 920000
We can then convert the outputted number into scientific notation
In doing so we get 9.2 x 10⁵
Its important to note that the coefficient (9.2) must have 2 significant figures as the given numbers do.
All we did to convert to scientific notation is add a decimal in between the two sig figs and multiply (9.2) by 10 to the power of how many decimal places we moved over to get to 9.2. Here we moved the decimal point 5 places from 920000. to get to 9.2 therefore the answer in scientific notation would be 9.2 x 10⁵
(You can easily calculate this by plugging this into a calculator)