How do you convert parts per million (ppm) to meters?

Giving ad is congruent to bc and angle bcd is congruent to angle adc prove d e is going to ce

Antonia and carla have an equivalant percentage of green marbles in their bags of marbles. antonia has 4 green marbles and 16 total matbles. if carla has 10 green marbles , how many total marbles does carla have

Ageologist had two rocks on a scale that weighed 4.6 kilograms together. rock a was 0.5 of the total weight. how much did rock a weigh?