9. Ilang bansa na kabilang sa developing countries na unang mabilis na tinangkilik ng mga mamamayan sa pagggamit ng cellular phones?

Answerthe distance to nearby stars;

The earth's inner core is the earth's innermost part. it is primarily a solid ball with a radius of about 1,220 km (760 miles), which is about 70% of the moon's radius.[1][2] it is composed of an iron–nickel alloy and some light elements. the temperature at the inner core's surface is approximately 5,700 k (5,430 °c), which is about the temperature at the surface of the sun.