GRE
The diameter of the rim of the crater
3,000 meters
$$\frac{ST}{RT}$$
$$\frac{ST}{RS}$$
$$(4^{a})(4^{b})$$
$$2^{2a+2b}$$
The greatest positive prime factor of 48
The greatest positive prime factor of 45
$$a-b$$
$$0$$
The length of line segment AB
$$\sqrt{5}$$
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