Question

Jenna calculated several numbers in her calculator. The result displayed -1.7E-4 on the calculator screen. Which equivalent number(s) does this represent? Select all that apply.

1. -1.7 x 10^-4
2. 1.7 x 10^-4
3. 0.00017
4. -0.00017
5. -1,700

Answer 1

1 and 4.

Explanation:

That would be -1.7 * 10^-4.

Also it can be written as -0.00017.

Answer 2

1, 4

Explanation:

e is the exponent of the number, therefore it is the number which 10 is raised by, so -4.

Which means -1.7 will be multipled by 10 raised to the -4 power, so 1 is obviously correct.

Additionally, This is in scientific form. You can also write this in standard form in decimals, 10^-4 means it is 4 decimal places ahead the original number so you can move the decimal point back 4 places and add 0s, you will see that -0.00017 is also in fact correct.