<h2>
Answer: 2.59 × 10¹⁰ kilometers/day</h2>
<h3>
Step-by-step explanation:</h3>
Since there are 86400 seconds / day
& light travels at 3 x 10⁵ kilometers / second
Then kilometers the light travels in a day
= (86400 seconds / day) × (light travels at 3 x 10⁵ kilometers / second)
= 2.59 × 10¹⁰ kilometers/day
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<u>Note:</u>
<em>We know that we have to multiply because the unit 'seconds per day' has the seconds in the numerator, while the unit 'kilometer per second' has the seconds in the denominator, so to cancel we would have to multiply. This gives us the unit we are looking for 'kilometeres per day'.</em>
