Answer:
1)

2)

Explanation:
To put a value into scientific notation, we need to:
1) Move to decimal place such that our new value is between 1 and 10 and
2) Multiply by 10^n, where n is the amount of spaces moved. If we moved to the left, n is positive. If we move to the right, n is negative.
1)
We have:

We can view this as:

Our new value should be between 1 and 10.
58000000
So, let's move our decimal 7 places to the left. This gives us:

Since we moved 7 to the left, we need to multiply by 10^7. Note that the 7 is positive. So:

We can remove the trailing zeros and add our unit:

2)
We have:

Our new value should be between 1 and 10. So, move the decimal places 3 units to the right. This yields:

Since we moved 3 to the right, we need to multiply by 10^(-3). This time, note that our exponent is negative. So:

Add our unit:

And we're done!