Final answer:
Mars' orbital period in Earth years is approximately 1.233.
Step-by-step explanation:
Mars' orbit can be calculated using Kepler's third law. The orbital period of Mars, in Earth years, can be determined by taking the square root of Mars' distance from the Sun, which is given as 1.524 AU. So, P = square root of 1.524, which is approximately 1.233 Earth years. Therefore, Mars' orbital period in Earth years is approximately 1.233.