Question

they want me to round the immediate result to the correct number of significant figures.

Answer 1

Answer:

Part C: 0.467

Part D: 31

Explanation:

Whenever we are multiplying or dividing two numbers with different significant figures, the final result attains the significant figures of a factor with the lowest significant figures.

Therefore. we compute

$24.9\times1.99\div106.99$

to get

$0.4666258$

Now, the lowest significant figures present in the factors is 3; therefore, rounding the above to 3 significant figures gives

$0.467$

Part D.

The lowest number of significant figures present in a factor is 2; therefore, we will round our final answer to 2 significant figures.

Now,

$(2.200\times10^6)\div(7.0\times10^4)=31.42857$

Rounding to 2 significant figures gives

$31$

which is our answer!