If an electromagnetic wave has a frequency of 8 x 1014 Hz, what is its
wavelength? Use The speed of light is 3 x 108 m/s.

All electromagnetic waves move at the speed of light (3 x 108 m/s).  Thus, for any electromagnetic wave:

Step-by-step explanation:

c = νλ

Thus, the wavelength, λ, is:

λ = c

λ = (3 x 108 m/s)/(8 x 1014 Hz)  *Note: Hz =

λ = 3.75 x 10-7 m

but wavelength of an electromagnetic wave is usually given in nanometers, so:

λ = 3.75 x 10-7 m x (1 nm/(1 x 10-9 m)

λ = 375 nm

56.6

step-by-step explanation:

the ratio of the perimeters is equal to the scale.

the ratio of the areas is equal to the square of the scale.

34 / 20 = k

a / 19.6 = k²

substituting:

a / 19.6 = (34 / 20)²

a = 19.6 (34 / 20)²

a ≈ 56.6

the volume is the product of the area of the base, 3x(3x+4), and the height, 3x-1

step-by-step explanation: