The jackfruit the largest tree fruit in the world are known for its size and for its strange musky smell

Explanation:

The error in this sentence is the word "are". In this case it needs to be "is" since the sentence is referring to the JackFruit Trees in general but is still in singular form and in present tense. Therefore, for the sentence to be correct and make sense you would need to swap these two words. After doing so you can add commas and the correct sentence would be the following.

"The jackfruit, the largest tree fruit in the world, is known for its size and for its strange musky smell"

7

explanation:

it depends on what grade.

kindergarten to senior year in high school will go for about 7 hours. pre-k will go for bout 4-5 hours. college, it depends on your classes.