If the odometer on the car reads 25.0 km at the beginning of a trip and 65.0 km a half hour later, what is the average speed of the car? (remember significant digits.) a. 0km/h b. 80km/h c. 80.km/h d. 80.0km/h

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.

Which of the following are considered noble gases? a. bromine b. neon c. argon d. chlorine

Which of the following is the phase that results when the moon is on the opposite side of the earth from the sun? a. quarter moon b. crescent moon c. new moon d. full moon