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Price discounts |
2008-06-14 |
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karonn pose la question :
Kinky Trading sells an items for RM90 less 25% and 10%. Softee Trading sells the same item for RM100 less 30%.
(a) find the net price of the item for the two companies.
(b) what additional discount percent must be offered by the company that sells at higher net price in order to meet the competitor's price?
Penny Nom lui répond. |
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Percent difference? |
2008-06-14 |
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Cathy pose la question :
I am trying to verify a "percent of difference" as stated on a tax form. I cannot seem to come up with the equation to do so.
Here are a few examples on the form:
Last year $62.91 this year $66.05 tax difference $3.14 percent difference -5.64%
Last year $ 2014.97 this year $1982.93 tax difference $-32.04 percent difference 57.56%
Last year $97.66 this year $79.58 tax difference $-18.08 percent difference 32.48%
I have tried several different ways and per some of Q&A's already on your site I still have a problem and would appreciate some assistance.
Thanks-Cathy
Penny Nom lui répond. |
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Escort cards on a rectangular table |
2008-06-13 |
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Susan pose la question :
What size rectangular table will we need to put 230- 2" X 3.5" escort cards on for my daughter's wedding reception with a spacing of .5 inch between them on all sides? Thanks so much for your help
Penny Nom lui répond. |
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A right prism with a square base |
2008-06-13 |
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Malik pose la question :
Question from Malik:
A company wants to alter the dimension of container. The new container is in the shape of right prism equivalent to the current one.
The current container has height of 12cm and square base. The new container has also square base, but in the dimension base is increased by 3cm and height is decreased by 5cm.
if the cardboard is used to manufacture the new container, what area of cardboard is used to make new container?
Penny Nom lui répond. |
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How far away is the horizon? |
2008-06-13 |
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Ali pose la question :
A plane is 10km above the earths surface, and you want to know how far away the horizon is, you know that the radius of the earth is about 6400km, how far away is the horizon along the earth's curved surface. My teacher has drawn a diagram; a circle representing the earth with one vertex at the center of the earth, another vertex outside the cirlce representing the plane (the distance between the earth and plane is 10km) and the last one is on the circle representing the horizon. Could you please explain how I would solve this problem, thanks!
Penny Nom lui répond. |
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How many yards of concrete will I need? |
2008-06-12 |
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Ron pose la question :
I am putting up a flag pole, and I am trying to fiqure out how much concrete I need for the job. I have a round cardboard cement tube which is 18" across and 24" tall. The bottom of the tube will be filled with 3" of gravel and 3" of sand and the rest will be filled with concrete. Could you tell me how many yards of concrete I need.
Harley Weston lui répond. |
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-2(x - 1)^2 + 8 |
2008-06-12 |
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kasondra pose la question :
y=-2(x-1)2[thats a square] +8 that need to be put in standard form
the answer is y= -2x2 -4x + 6
i got y= -2x2 -4x -4
i just don't get how my teacher got that answer
Penny Nom lui répond. |
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If the arc is 75mm, what is the radius? |
2008-06-12 |
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malcolm pose la question :
If the are is 75mm, what is the radius?
Janice Cotcher and Harley Weston lui répond. |
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tan(4a - b) |
2008-06-12 |
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A student pose la question :
hi guys just a quick help on question needed thanx
if tan a = 1/5 and
tan b = 1/239
find value of tan(4a-b)
thanks alot in advance
Harley Weston lui répond. |
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The current in a river |
2008-06-12 |
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Joi pose la question :
To approximate the speed of the current of a river, a circular paddle wheel with radius 4 feet is lowered into the water. If the current causes the wheel to rotate at a speed of 10 revolutions per minute, what is the speed of the current? Express your answer in miles per hour.
Harley Weston lui répond. |
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Percent improvement |
2008-06-12 |
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JOHN pose la question :
IF YOU HAD A RATE OF 678/HOUR AND YOUR NEW RATE/HOUR
IS NOW 1961 WHAT IS PERCENT OF IMPROVEMENT
Penny Nom lui répond. |
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Two rhombi |
2008-06-12 |
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Malik pose la question :
("rhombus" diagram is attached)
ABCD and EJCD are rectangles.
EFHG and HIJK are similar rhombus.
HIJK is 4times bigger than EFHG.
In each rhombus the larger diagonal is double of the smaller one.
If AB = 30cm, what is the lenght of the diagonals of the smaller rhombus ?
Penny Nom lui répond. |
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The rate of change in the depth of the water |
2008-06-12 |
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Liz pose la question :
A rectangular pool 50ft long and 30ft. wide has a depth of 8 ft. for the first 20 ft. for its length and a depth of 3 ft. on the last 20ft. of its length and tapers linearly for the 10 ft in the middle of its length. the pool is being filled with water at the rate of 3ftcubed/ min
at what rate is the depth of the water in the pool increasing after 15 hours?
Harley Weston lui répond. |
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Scientific notation |
2008-06-11 |
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ASTRID pose la question :
how can you solve the following problem...
the mean distance between the sun & plut0 is about 3,700,000,000
miles. write this distance in scientific notation?
Penny Nom lui répond. |
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The length and width of a rectangle |
2008-06-11 |
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gregg pose la question :
the perimeter of a rectangle is 70 feet. the ratio of length to width is 4:3. how would i calculate the length of the height and width?
Penny Nom lui répond. |
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