To estimate the number of subscribers as a single digit times an integer power of 10, we can round the given number to the nearest power of 10.
The given number of subscribers is 77,000.
Rounding 77,000 to the nearest power of 10 (which is 10^4 or 10,000), we get:
77,000 ≈ 8 × 10,000
So, an estimate for the number of subscribers as a single digit times an integer power of 10 would be 80,000.