Round the numbers to the highest place value. 2 398-
56 254-
71 563-
33 021-
9 645-

Step-by-step explanation:

Given

Required

Round up to highest place value

Highest place value here is thousand.

So:

, when approximated

Highest place value here is ten thousand.

So:

, when approximated

Highest place value here is ten thousand.

So:

when approximated

Highest place value here is ten thousand.

So:

when approximated

Highest place value here is ten thousand.

So:

when approximated

use formula for the circle a=3.14

step-by-step explanation:

a. is correct