Question

What is the order of 4 x 10^-7, 7 x 10^-9, 1 x 10^4, 2 x 10^4

Answer 1

c

Explanation:

7 × 10-9, 4 × 10-7, 1 × 104, 2 × 104( im doing the test and i don't want to fail either )

Answer 2

From least of greatest:
`7* 10^(-9),4* 10^(-7),1* 10^4,2* 10^4`

Explanation:

We have been given 4 number in scientific notation. We are asked to write our given number in order.

To write our given numbers in order we need to write these number according to their degrees.

We know that a number with greatest positive degree is the largest number, while a number with largest negative degree will be smallest number.

Upon looking at our given numbers we can see that the number
`7* 10^(-9)` has the largest negative degree, so it will be the smallest number.

We can see that number
`4* 10^(-7)` has the second largest negative degree, so it will be the next number for our given numbers.

We can see that
`1* 10^4,2* 10^4` has the same degree, but
`2* 10^4` has a leading coefficient of 2, so it will be the largest number.

Therefore, our given numbers from least to greatest order will be
`7* 10^(-9),4* 10^(-7),1* 10^4,2* 10^4`.