Answers edited by Mr. X.

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• Light of frequency 5×10^4 is travelling in a medium of refractive index 1.5. What is the wavelength?
  
• A 95 kg student slides down a waterslide that is 13 m high. How fast is he going at the bottom?
  
• Which has more momentum: a 20,000 kg cement truck traveling at 5 m/s or a 1000 kg. race car traveling at 90 m/s?
  
• How do you solve for #x#: #7+ a x = 14- bx#?
  
• How do you find the domain and range of #f(x)=1/(2x-4)#?
  
• How do calculate that? pls help me
  
• How do i find csc(7pi/3)? the answer is (2√3)/3
  
• How do you solve #(x-1)/-4=2/3#?
  
• What is the derivative of #y=arcsin(x/7)#?
  
• How do you find the exact value of sin 45 degrees?