Which statements describe global postitioning systems

1.is used to map routes to unfamiliar places

2.is a feature offered in new cars

3.is used to pinpoint your exact location on the earth

Explanation:

81 is a composite number.

a mid-ocean ridge or mid-oceanic ridge is an underwater mountain range, formed by plate tectonics. this uplifting of the ocean floor occurs when convection currents rise in the mantle beneath the oceanic crust and create magma where two tectonic plates meet at a divergent boundary.a geomagnetic reversal is a change in a planet's magnetic field such that the positions of magnetic north and magnetic south are interchanged.