Question

Write 0.000000648 in scientific notation. 648 × 109 6.48 × 107 6.48 × 10−7 648 × 10−9

Answer 1

The number 0.000000648 in scientific notation is written as 6.48 × 10⁻⁷.

Step-by-step explanation:

To write the number 0.000000648 in scientific notation, you need to move the decimal point so that the number is between 1 and 10. In this case, we move the decimal point seven places to the right, which gives us 6.48. Since we moved the decimal to the right, the exponent will be negative. Thus, the number in scientific notation is 6.48 × 10⁻⁷.

Here are some additional examples of numbers written in scientific notation:

The number 306,000 is written as 3.06 × 10⁵.

The number 0.00884 is written as 8.84 × 10⁻³.

The number 2,760,000 is written as 2.76 × 10⁶.

The number 0.000000559 is written as 5.59 × 10⁻⁷.

Answer 2

6.48 x 10^(-9)

Step-by-step explanation:

0.000000648

Count the number of times the decimal point needs to be moved sop that it rests just after the first non-zero number:

0.000000648 Original

00.00000648 1

000.0000648 2

0000.000648 3

00000.00648 4

000000.0648 5

0000000.648 6

00000006.48 7 We moved the decimal point 7 times to the right., "To the right means a negative exponent. 7 spaces to the right means 10^(-7)

6.48 x 10^(-9)

Answer Options [Remember to add the up carrot "^" to designate the number as an exponent. 648 × 109 = is 648 time 109, fun but not correct]

648 × 10^9

6.48 × 10^7

6.48 × 10^−7

648 × 10^−9 None of the options are correct, but this one would be if there were a decimal point after the 6.