An ECEF coordinate system is an Earth-based three-dimensional coordinate system with its at the mass-center of the Earth, its aligned with the semi-minor (spin) axis of the Earth defined at some epoch, its in the plane of the equator passing through mean Greenwich meridian, and its in the plane of the equator and creating a coordinate system.

b

step-by-step explanation:

a

step-by-step explanation:

the answer is:

the answer is:

to solve the problem, we need to remember the quotient of power property, it's defined by the following relation:

if we have a quotienf of powers that have the same base, we need to keep the same base and subtract the exponent of the denominator power to the exponent of the numerator power.

so, we are given the expression:

then, calculating we have:

hence, the answer is:

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