Why does the same side of the moon always face earth? a. the rotational period of earth is the same as that of the moon b. the rotational period of earth is equal to one revolution around earth c the rotational period of the moon is equal to one revolution around earth d. the rotational period of the moon is different than one revolution around earth

This line graph compares the growth of plants that were kept in the sun for different amounts of time.a)  on day 7, the plants kept in the sun for 3 hours were how tall? b)  on day 7, the plants kept in the sun for 6 hours were how tall? c)    on day 10, the plants kept in the sun for 9 hours were how tall? d)  on day 11, the plant that was grown with 1 hour of sunlight was how tall? e)  based on the graph, the plant grows best in what amount of sunlight?

Iknow the answer to 13 is b and 14 is d. i just need to know why the correct answers are correct

What’s the percent by mass of carbon in c10h14n2