Answer:
The answer is [tex]d(t)=3,906,000[/tex] miles.
Step-by-step explanation:
To solve this is pretty easy,
We know that the equation is [tex]d(t)=186000t[/tex], and since we have to find the distance in 21 seconds, you just have to substitute the variable.
[tex]t=time\\d(t)=186000(t)\\d(21)=186000(21)\\d(21)=3,906,000[/tex]
If this helped please give brainliest
