The answer is C. in sort of a way. You can't technically see black matter. However, it is holding the galaxies together.
Light travels in waves AND in bundles called "photons".
It's hard to imagine something that's a wave and also a bundle.
But it turns out that light behaves like both waves and bundles.
If you design an experiment to detect waves, then it responds to light.
And if you design an experiment to detect 'bundles' or particles, then
that one also responds to light.
Answer:
68.9233231661
Explanation:
Just put it into your calculator, shift sin should do it but it will come up like this: 
which is the same as arcsin
C., used in power plants I think.
Answer:
True
Explanation:
-NIST 800-14's are generally accepted principles for securing information technology systems.
- The defined principles, if adhered to and continously improved, will will ensure sytem security over it's lifetime as desired.
