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Question about Rational Exponents

Math

Originais Teachy

Rational Exponents

Medium

(Originais Teachy 2023) - Question Medium of Math

A scientist wants to calculate the amount of heat that will radiate from a source. For this, he uses the following equation where I is the intensity and R is the distance: I = k*R^(-2), with k being a constant. Suppose the intensity of the source at a distance of 1 meter is 100 W/m². What will be the intensity of the same source at a distance of 2 meters?
a.
25 W/m²
b.
400 W/m²
c.
50 W/m²
d.
200 W/m²
e.
12.5 W/m²

Answer:

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