I also need help with 9.67nm=???km

and
2.3X10 to the -4g=????ng

3 answers

Let see: nano is 10^-9

9.67*10^-9 m

2.3*10^-4g * 10^9ng/g=....
so if I did this right the answer would be -2.3x10^13 correct?
No. Two errors. Where did the minus sign come from? It shouldn't be there.

To multiply exponents we add them. -4 + 9 is not 13.