Question
Round off the following number to three significant figures: 431.50
Ask by Harper Cox. in the United States
Mar 23,2025
Upstudy AI Solution
Tutor-Verified Answer
Answer
431.50 rounded to three significant figures is 432.
Solution
We have the number
-
Identify the first three significant figures. The digits of
are , , , , . The first three significant digits are , , and . -
Look at the fourth digit, which is
. Since , the third significant digit is rounded up to . -
After rounding, the number becomes
.
Thus, the number
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Simplify this solution The Deep Dive
To round off 431.50 to three significant figures, you start by identifying the first three non-zero digits, which are 4, 3, and 1. The next digit, which is a 5, indicates that you need to round up the last digit you’re considering (the 1) by 1. Therefore, 431.50 rounded to three significant figures becomes 432.
If you’re ever in doubt about how to round, remember that if the number to the right of your last significant digit is 5 or higher, you round up. It’s a balancing act between getting it right and keeping those digits meaningful!
