Frequency= speed/ wavelength
f= 3.0 × 10^8 m/s/ <span>3.5 × 10^-9 m
=8.57x10^16
The answer is letter </span><span>B. 8.57 × 10^16 Hz.</span>
The advertising method that this demonstrates is card stacking.
An advertising method in which the buyers are persuaded to buy a product by deliberately disguising information and trying to distort actual details by suppressing the holistic information on the product.
In this case, the company is focusing on the positive side of the product thereby deliberately excluding other important details about harm caused by the product.
This is a case of card stacking.
Learn more: brainly.com/question/3163475
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