Answer
$$\frac{x^2}{1.69\times 10^{16}}+\frac{y^2}{1.5625\times10^{16}}=1$$
Work Step by Step
a = 130,000,000
b= 125,000,000
$$\frac{x^2}{a^2}+\frac{y^2}{b^2}=1$$
$$\frac{x^2}{1.69\times 10^{16}}+\frac{y^2}{1.5625\times10^{16}}=1$$
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