Question

Evaluate and write the answer in scientific notation:
1.6 x 105/8
1.6 x 10-3
1.6 x 103

Answer 1

It's the second one:

1.6 x 10^(-3)

you would divide 4 by 2.5 and you would divide 10^5 by 10^8. Dividing 4 by 2.5 yields 1.6 and since that number is between 1 and 10, we don't have to adjust the decimal point. When dividing 10^5 by 10^8, you just subtract the exponents.

Answer 2

thank you

Answer 3

You're welcome!

Answer 4

=D

Answer 5

i have one question though in equations you always add the exponents when its like this?:(4.1 x 10^5)(2 x 10^7) so it would be 8.2x10^12 ?

Answer 6

and here would you add the exponents?

Answer 7

You still subtract the exponents because it is still division. If you were multiplying, then you would add exponents.

Answer 8

again thank nyou!