Question

Which of the following numbers has the correct number of significant digits for the sum of 4.0125 and 5.72?

A. 9.7324
B. 9.732
C. 9.73
D. 9.7

Answer 1

A

Explanation:

Because according to my calculations there are supposed to be 5 digits and for the answers for the question A is the only letter with an answer with 5 digits.

My answer was 9.7325(even though the answers is different they still have the same number of digits) and for A it is 9.7324 which is another 5 digits.

Here is why I got 5 digits.

4.0125

5.7200

_______

When we add these we have to add 0er's to 5.72 because it doesn't have enough digits to add so you add zero's to it.

So 5 +0=5 2 +0=2 1 +2=3 0 +7=7 and for our last number 4 + 5=9 and so our answer is ?

9.7325

and the 9 = 1 digit 7=2 digit 3= 3 digits 2= 4 digits and last 5 = 5 digits.

Hope this helps have a great day:)

Answer 2

the answer to your question is 9.73