Middle School

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Light shining from the surface of Mars would take about 182 seconds to reach Earth. Light travels through space at 186,282 miles per second. Which expression can be used to calculate the distance, in miles, from Mars to Earth?

A) 186,282 ⋅ 182
B) 182 ± 186,282
C) 182 ÷ 186,282
D) 186,282 ÷ 182

Answer :

the distance light travels in 1 second - 186,282 miles
Therefore distance it takes to travel within 182 seconds - 186,282 miles/second x 182 seconds
Therefore to find the answer we need to multiply the distance it travels within a second with the amount of seconds it takes
correct answer is A) 186,282 ⋅ 182

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Rewritten by : Barada

Answer : The correct option is, (A) 186,282 × 182

Explanation : Given,

Time taken by light from surface of mars to earth = 182 seconds

Speed of the light = 186,282 miles per second = 186,282 miles/second

As we know that, the speed is defined as the distance covered by the object per unit time.

Formula used :

[tex]Speed=\frac{Distance}{Time}[/tex]

or,

[tex]Distance=Speed \times Time[/tex]

Now put all the given values in this formula, we get :

[tex]Distance=186,282miles/second \times 182seconds[/tex]

Hence, the correct expression will be, (A) 186,282 × 182