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Hatshy [7]
3 years ago
10

Find the exact value of each trigonometric function evaluated at the given angle.

Mathematics
1 answer:
viktelen [127]3 years ago
7 0

Answer:

Step-by-step explanation:

1. A cell is identified by its ........

a. Cell pointer b. cell address c. Box

2. When you measure cones, in which directions you should click on the dots

representing cones.

a. clockwise b. Anticlockwise c. Straight

3. Name the software that can make models of molecules included in

GNU/Linux ?

a. Geogebra b. Kalzium c. Ghemical

4. The abbreviation for Physics Education Technology?

a. PhET b. PHET c. PheT

5. For giving background colour to a slide, click ................. in Slide Menu

a. Character b. Properties c. Paragraph

II. Fill in the blanks (5 x 1 = 5 marks)

6. ............. is the model of pre-designed slides in a presentation software.

7. Name the GNU Linux software that helps to understand the particle nature

of matter.

8. .................. helps you to copy data or formulae to the adjacent cells.

9. What is the name of the tool in GeoGebra used for drawing triangle?

10. To give border lines to the cells in the table select ........... from Format

menu.

P.T.O

III. Match the following (5 x 1 = 5 marks)

Column A Column B

11. PhET a. Microsoft Power Point

12. Kalzium b. Geometrical Shapes

13. Presentation Software c. Calligra Sheets

14. GeoGebra d. Periodic Table

15. Spreadsheet Software e. States of matter

IV. Answer the following questions (5 x 1 = 5 marks)

16. What was the major limitation of Overhead Projector?

17. Which window is to be selected to get information about the elements in

the Kalzium software?

18. Name the website address of PhET Online Simulation?

19. What do you mean by Fill Handle tool in Spreadsheet software?

20. How can you draw triangles and polygons easily, using the Polygon tools?

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3 years ago
You travel 3 miles downstream in a kayak at a speed of r miles per hour. You turn around and travel 4 miles upstream at a speed
shtirl [24]
<h3>Write a model in simplified form for the total time t (in hours) of the trip:</h3>

Total\ time\ taken = \frac{3}{r} + \frac{4}{0.5r} + \frac{1}{r+1}\\

<h3>It takes 2.95 hours when r is 4 miles per hour</h3>

<em><u>Solution</u></em>:

Given that,

<h3>You travel 3 miles downstream in a kayak at a speed of r miles per hour</h3>

Downstream:

Speed = r miles per hour

Distance = 3 miles

Time taken is given as:

Downstream\ time = \frac{distance}{speed}\\\\Downstream\ time = \frac{3}{r} ------- eqn\ 1

<h3>You turn around and travel 4 miles upstream at a speed of 0.5r miles per hour</h3>

Upstream:

Speed = 0.5r miles per hour

Distance = 4 miles

Therefore,

Upstream\ time = \frac{4}{0.5r} -------- eqn 2

<h3>Finally, you turn around and return to your original starting point at a speed of  r + 1 miles per hour</h3>

Therefore,

time = \frac{1}{r+1} ----------- eqn\ 3

<em><u>a)Write a model in simplified form for the total time t (in hours) of the trip</u></em>

The total time taken is:

eqn 1 + eqn 2 + eqn 3

Total\ time\ taken = \frac{3}{r} + \frac{4}{0.5r} + \frac{1}{r+1}\\

<em><u>b)How long does your trip take when r is 4 miles per hour?</u></em>

Substitute r = 4

Total\ time\ taken = \frac{3}{4} + \frac{4}{0.5 \times 4} + \frac{1}{4+1}\\\\Total\ time\ taken = 0.75 + 2 + 0.2\\\\Total\ time\ taken = 2.95

Thus it takes 2.95 hours when r is 4 miles per hour

8 0
3 years ago
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