The speed of all electromagnetic waves is 3.00 × 108 meters per second. what is the wavelength of an x-ray with a frequency of 1.18 × 1018 hz? 2.54 × 1026 meters 3.93 × 109 meters 2.54 × 10-10 meters 3.93 × 10-11 meters

Explanation :

Given that,

The speed of all electromagnetic waves is,

Frequency of x-ray,

The speed of the wave is defined as the product of the frequency and the wavelength.

So, the correct option is (c).

Hence, this is the required solution.

the old price per ounce is c/4.

the new price per ounce is c/3.6.

the ratio of the old price to the new one is

(c/4)/(c/3.6) = (c/c)×(3.6/4) = 0.9 . . = 9/10 . . "nine tenths" in either form