Question

The function d(t) =300,000t represents the distance (in kilometers) that light travels in t seconds

Answer 1

We were given the distance, d as a function of time, t.

$d(t)=300,000t$.

To find $d(15)$, we put $t=15$, in to

$d(t)=300,000t$

This implies that,

$d(15)=300,000(15)$

$d(15)=4,500,000$

This means that in 15 seconds light covers a distance of 4,500,000 kilometers

Answer 2

Answer:

$d(15)=4,500,000$ kilometers

Step-by-step explanation:

The distance traversed by a beam of light is represented as a function of time:

$d(t)=300,000 t$

This function represents distance traveled by the light in 't' seconds.

Now d(15) means, how much distance will the light beam cover in 15 seconds.

Putting t=15 in the function will tell us the distance traveled by light in 15 seconds.

$d(15)= 300,000 \times t=300,000\times 15=4,500,000$

So basically light has traveled, 4.5 million kilometers in 15 seconds.