The temperature is -20C. If the temperature rises by 15 oC, what is the new temperature?

Answer is in the photo. I can't attach it here, but I uploaded it to a file hosting. link below! Good Luck!

cutt.ly/tz3yDpb

Left

Explanation:

To convert from Nanograms to centigrams, you have to move the decimal to the left hand side.

          1 nanograms  = 1 x 10⁻⁹g

          1 centigrams  =  1 x 10⁻² g

So to convert from nanograms to centigrams,

          Multiply by 1 x 10⁻⁷ or move 7 places to the left