Plzz help guyss I'm so confused Starting from rest, you reach a speed of 20 m/s in 4 seconds. What is your acceleration?

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?

Which of the following is always a reactant in a combustion reaction? oxygen nitrogen hydrogen carbon

What layer of the atmosphere is directly above the troposphere?