To simplify this:

You can factor the denominator and then cancel out some terms. But, this is not factorable. So, I think you are missing a term or you wrote this wrong.
To work out how many miles the distance from the airport to the beach, we can use 1km ≈ 0.62 miles
To get from 20km from 1km, we multiply by 20
If we do the same to 0.62
0.62 x 20 = 12.4 miles
Next step is to add this on to the 500 miles they travelled by plane
500 + 12.4 = 512.4 miles
Answer:
5.779 x 10^-8 =0.00000005779
Step-by-step explanation:
The E-8 at the end means the number is multiplied by 10^-8.
So 5.779E-8=5.779 x 10^-8
A negative power means move the decimal place that many places to the left
So 5.779 x 10^-8 =0.00000005779
16c+1
You add the LIKE terms together.