c is correct.
(Pe)²/(De)³=(Pj)²/(Dj)³ (Pe stands for period of Earth, De for Distance of Earth from Sun,
Because Dj=5.2De
(Pe)²/(De)³=(Pj)²/(5.2De)³
Pj=√(5.2³)(Pe)²=(5.2³)(1)² ≈11.9 =(note: Pe=1 earth year)
The answer is 78.99%, So rounded up to 79%
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<span>9x(2+y)
= 18x + 9xy
answer
</span><span>18x+(9x⋅y)
</span><span>(9x⋅2)+(9x⋅y) 1</span>