Question

The diameter of earth is 1.28 x 10^4 kilometers write this number in standard notation

Answer 1

Answer: here you go...

Explanation:

Original Number: 12,800

New Number: 1.2800

New Number: 1.2800

Decimal Count:1234

Remember, the notation is: a x 10b

a = 1.28

b = 4

Now the whole thing:

1.28 x 104

Check your work:

104 = 10,000 x 1.28 = 12,800

Answer 2

12800 km is the diameter of earth.

Explanation:

1.28*10000