High School

1. Everyone in Andy’s class has to do a science project. Out of the 20 students, 80% have completed their project. How many students still need to finish their projects?

2. The circle graph below shows the number of hours per week a college student spends studying each subject of a college core curriculum.
- The portion labeled History represents 13 hours.
- The portion labeled English represents 5 hours.
- The portion labeled Math represents 9 hours.
- The portion labeled Art represents 10 hours.
- The portion labeled P.E. represents 6 hours.

Approximately what percent of these hours is spent on art and math combined?
- about 60%
- about 45%
- about 25%
- about 20%

3. Emily has 85 books on her bookshelf. Of those books, 17 are mysteries, 18 are adventure stories, and the rest are fantasies. What is the simplified ratio of fantasies to total books on her bookshelf?
- 35:50
- 7:17
- 5:8
- 10:17

Note: Please show your work.

Answer :

To find the number of students who still need to finish their science projects:

Calculate 80% of 20 students: 20 x 0.8 = 16 students have completed their projects.

Subtract the number of students who have completed their projects from the total: 20 - 16 = 4 students still need to finish.

To determine the percentage of hours spent on art and math combined:

Add the hours spent on art and math: 10 hours (Art) + 9 hours (Math) = 19 hours.

Calculate the percentage: (19 hours / 43 total hours) x 100% ≈ 44.19%.

Therefore, approximately 45% of the total hours are spent on art and math combined.

For the simplified ratio of fantasies to total books on Emily's bookshelf:

Calculate the number of fantasy books: 85 total books - 17 mysteries - 18 adventure stories = 50 fantasy books.

Determine the simplified ratio: Fantasies : Total books = 50 : 85, which simplifies to 10 : 17.

Answer:

4 students for the first

Step-by-step explanation:

i will finish answering a little bit later

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