Two vectors a is 3i-4j-5k and 6i+2j-5k find angle between a and b

Which of the following represents an upside-down image?

The summit of chimborazo, in ecuador, which is at a distance of about 6,384 km from the earth’s center. the bottom of the mariana trench, in the western pacific ocean, which is nearly 6,370 km from the center of the earth. on the surface of earth on the equator line.

Mga halaman/punong ornamental na di namumulaklak