NEED HELP, I JUST NEED MY ANSWERS CHECKED!
Check the comments.

Question

NEED HELP, I JUST NEED MY ANSWERS CHECKED! 
Check the comments.

anonymous · Answer

If cos 67 degrees is close to 2/5, which is closest to NO?

anonymous · Answer

The answer choices are a) 2 centimeters b) 20 centimeters c) 40 centimeters and d) 60 centimeters. I said 40, but I'm not sure.

anonymous · Answer

"Find the period, range, and amplitude of the cosine function. y= -5 cos 6x"

anonymous · Answer

"A sine function can be used to model light waves. Green light has a wavelength, or period, of about 530 nanometers. Which equation best models green light?"

anonymous · Answer

@ganeshie8 I'd be eternally grateful if you'd help me out, I need to do this ASAP and I'm not doing very well, time wise.