<span title="Math......................?">Math........................</span>

Question

Perform the indicated operations and express your answer to the correct number of signifcant digits

1.

(6.92)(7.9)

please show details on how to do it

Answer 1

I think this is how you do it but I am not 100% positive.

(6.92)(7.9)=6.92x7.9=54.668

there you go!

Answer 2

55

you can only get as many digits out of the problem as you put in.  so youre answer no matter what is 2 sig figs.  the answer on a calc would be 54.6something, but since youre limited to 2 sig figs, youd round to 55.

EDIT

don&#039;t listen to the rest of these peons...they dont know what significan figures are.

Answer 3

I&#039;m assuming you want this performed long-hand?

  6.92

  7.9

-------

_6228 &lt;-- multiply 9 by 692

48440 &lt;-- multiply 7 by 692 (remembering that &quot;extra zero&quot;)

---------

54668 &lt;--- sum of the two numbers

54.668 &lt;--- put the decimal point in based off of the number of decimal places in each number being multiplied (In this case, 7.9 has one decimal place and 6.92 has 2 decimal places; therefore, the final answer will have the sum these decimal places (1 + 2), which is 3 decimal places)

Answer 4

note

multiply the numbers

692(79) = 54668

add the decimal places = 3

and count them over

54.668

the significant decimal place is the most in the problem

2 positions, so

54.67