The answer would be 17/4.
X=10 y= 8 i think
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Answer: 1) equation relating both
N+F = 19
2)N = 7
Step-by-step explanation:
N+F =19
He folded 12, so F = 12
N = 19-12 = 7
<u>Answer:</u> The wavelength for X-rays with the given frequency is 
<u>Step-by-step explanation:</u>
To calculate the wavelength of light, we use the equation:

where,
= wavelength of the light
c = speed of light = 
= frequency of light = 
Putting the values in above equation, we get:

Hence, the wavelength for X-rays with the given frequency is 