Question

the diameter of neptune is 30,599 miles. approximate the diameter of neptune to the nearest thousand miles. the diameter of neptune is about miles.

Explanation:

Step1: Identify the thousands digit

The number is 30,599. The thousands digit is 0, in the 1000s place, with the number being $3\times10^4 + 0\times10^3 + 5\times10^2 + 9\times10^1 + 9\times10^0$.

Step2: Check the hundreds digit

The hundreds digit is 5, which is $\geq5$.

Step3: Round up the thousands place

Add 1 to the thousands digit: $0 + 1 = 1$, set lower digits to 0. The ten-thousands digit remains 3, so the number becomes 31,000.

Answer:

31,000