Express in scientific notation. make sure your answer has the same number of significant figures as the starting value. 1,645.6 = 1.64563 1.6456 x 10-3 1.6456 x 103

Step-by-step explanation:

The starting value is

Now, the whole part of a scientific must between 0 and 9, and we will preserve the same number of significant digits, that is, the same digits will remains.

Also, observe that the decimal point is between 5 and 6. We need to move the decimal point between 1 and 6, as follows

Then, count the number of spots we moved the decimal point. We moved 3 spots, that meanst the exponent of the scientific notation is 3. Applying all these things, we have

Therefore, the right answer is the last choice.

the answer would be 1 1/72

step-by-step explanation:

you can rewrite the equation by separating the parts and then solving individually:

10-9=1

1/8 - 1/9=

find l c d and then combine:

1 1/72