math
posted by bobby on .
is 1 nm is equal to 0.000000001?
how would you write 0.15 nm in standard form?
how would you write 565 nm in normal numbers?
how would you write 590 nm in normal numbers?
thanks

Yes, 1 nm = 0.000000001 m
As far as I know, all of the above are standard or normal form, using nm as the unit. 
Here are some common metric prefixes, symbols and the corresponding multiplicative factors that may help you:
tera (t) 1,000,000,000
mega (m)  1,000,000
kilo (k)  1,000
milli (m)  1/1,000
micro (μ)  1/1,000,000
nano (n)  1/1,000,000,000
For example,
1 ns = 0.000 000 001 second
1 mm = 0.001 metre
1 mb = 1,000,000 bytes
(note: sometimes mb is used to mean 1,048,576 bytes, equal to 2^{20} bytes). 
for the last two questions i meant decimal form, im so confused

You probably meant in "decimal metres".
565 nm = 0.000 000 565 metre
Notice that I have used a "space" as a digital group separator. Depending on the context, a comma is more commonly used in U.S. while the space is recommended by the ISO.