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Scale factor |
2008-05-28 |
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Riley pose la question :
I have a math problem, and a big test coming up on Friday or Thursday (my teacher hasn't decided yet.) I need help understanding how
I would do this problem. Here it is: they wanted me to find the perimeter and area of a rectangle when they only give me the scale factor. I've
delt with scale factors before, but this is quite confusing. I have done the scale factor way by having a rectangle that maybe has a width of 10 and a
height of 20, and I needed to find what the scale factor would be for a rectangle with the width of 5 and a height of 10. I know that they scale factor
would be 2, right? But this just gives me the scale factor, and I have to FIND the perimeter and area. Hopefully you can get back to me tonight.
Harley Weston lui répond. |
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The area of a rectangle |
2008-05-27 |
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Becky pose la question :
the area of a rectangular lot is represented by 6t^2+13t-5. What are the length and the width of the rectangular lot?
Harley Weston lui répond. |
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The length of a shadow |
2008-05-27 |
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Simon pose la question :
A figure skater is directly beneath a spotlight 10 m above the ice. IF she skates away from the light at a rate of 6m/s and the spot follows her, how fast is her shadow's head moving when she is 8m from her starting point? The skater is (almost) 1.6m tall with her skates on.
Stephen La Rocque and Harley Weston lui répond. |
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A cat is walking on the tread of a tank |
2008-05-26 |
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Kathleen pose la question :
If a cat is walking on the tread of a tank travelling at 28kmh how fast does the cat have to walk to avoid falling under the tracks?
Janice Cotcher lui répond. |
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Convert cubic inches to gallons |
2008-05-26 |
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Rosemarie pose la question :
How do you convert cubic inches to gallons? Thanks for your help.
Penny Nom lui répond. |
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.5 cu ft of sand to lbs. |
2008-05-25 |
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rogersimmons pose la question :
needtocovert .5 cu ft. of sand into lbs.
Penny Nom lui répond. |
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I want to fill my backyard slope with fill dirt. |
2008-05-25 |
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Piero pose la question :
I want to fill my backyard slope with fill dirt. The slope is 50 feet wide and the distance from the top of the top of the slope to the bottom is about 15 feet deep and the slope angle is at a 45. I want to know how many yards of dirt do I need to fill a space that is 20 feet out, 15 feet deep at a 45 degree angle.
Stephen La Rocque lui répond. |
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Find a way to represent the length and width of the box. |
2008-05-25 |
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Angela pose la question :
The volume of a box that is two inches high can be represented by V=2X^2-20x+32. Find a way to represent the length and width of the box. (Hint: you will need to use factoring).
Stephen La Rocque lui répond. |
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Liquid is being pored into the top of a funnel |
2008-05-25 |
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Stella pose la question :
Liquid is being pored into the top of a funnel at a steady rate of 200cm^3/s. The funnel is in the shape of an inverted right circular cone with a radius equal to its height. It has a small hole in the bottom where the liquid is flowing out at a rate of 20cm^3/s. How fast is the height of the liquid changing when the liquid in the funnel is 15cm deep?
At the instance when the height of the liquid is 25cm, the funnel becomes clogged at the bottom and no mo re liquid flows out. How fast does the height of the liquid change just after this occurs?
Stephen La Rocque lui répond. |
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Ten acres |
2008-05-25 |
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RICHARD pose la question :
hi, i am getting 10 acres of ground from a aunt which is going to be taken out of a 50 acre tract.both the north and south lines are 1320 feet long.i need to know how long the east and west lines will be to make the 10 acres and what the square footage will be for the 10 acres
Harley Weston lui répond. |
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Gasoline in a cylindrical tank |
2008-05-25 |
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Simon pose la question :
A cylindrical tank with height 15m and diameter 2m is being filled with gasoline at a rate of 500L/min. At what rate is the fluid level in the tank rising?(1L = 1000cm^3). About how long will it take to fill the tank?
Penny Nom lui répond. |
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A triangle and a square |
2008-05-24 |
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s pose la question :
how to construct a triangle whose area is equal to the area of a given square?
Penny Nom lui répond. |
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Applications of trigonometry |
2008-05-24 |
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Mohita pose la question :
I have got a project in the school and i am not getting anything about the topic. The topic is that we need to find the application of trigonometry on any one of the real life situations using 3-dimensional figures. I mean how can trigonometry can be used in real life situations like navigation, architecture, survey, astronomy etc.
Penny Nom lui répond. |
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3 radical 48 +11 radical 75 |
2008-05-24 |
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Maria pose la question :
Add 3 radical 48 +11 radical 75. Write answer in simpliest form.
Penny Nom lui répond. |
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The surface area of a cube |
2008-05-24 |
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cailtlin pose la question :
hi.. if the surface area of a cube is 384 cm^2, how could i find the length of one edge? thank you
Penny Nom lui répond. |
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