The answer is D., a dummod deleted my answer that has alot of thanks and ratings.
You are being asked to make π the subject in

So divide both sides of the equation by

That is

The you have

or

I hope this is helpful?
Answer: it is D and if it is wrong then it doesn’t look like this question was finished.
Step-by-step explanation:
Scientific notation, also called pattern or notation in exponential form, is a way of writing numbers that accommodate values too large (100000000000) or small (0.00000000001) to be written in a conventional manner.
The use of this notation is based on powers of 104
Example:
Big numbers:

Small numbers:

However, in areas such as physics and chemistry, scientific notation is important to make approximations such as:
mass of a proton
mass of an electron and others.
Answer:
The rocket has a faster unit rate and is
much faster than the penny
Step-by-step explanation:
Find the unit rate of each object and the compare the results
step 1
Find the unit rate per hour of the rocket
To find the unit rate divide the total distance by the time
Let
d -----> the distance in km
t -----> the time in hours
we have


Find the unit rate

step 2
Find the unit rate per hour of the penny
To find the unit rate divide the total distance by the time
Let
d -----> the distance in km
t -----> the time in hours
we have


Find the unit rate

step 3
Compare the unit rates
The units rate of rocket is 
The unit rate of penny is 
Find the difference

therefore
The rocket has a faster unit rate and is
much faster than the penny