 |
|
|
|
|
|
|
|
|
Price discounts |
2008-06-14 |
|
From karonn:
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?
Answered by Penny Nom. |
|
|
|
|
|
|
Percent difference? |
2008-06-14 |
|
From Cathy:
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
Answered by Penny Nom. |
|
|
|
|
|
|
Escort cards on a rectangular table |
2008-06-13 |
|
From Susan:
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
Answered by Penny Nom. |
|
|
|
|
|
|
A right prism with a square base |
2008-06-13 |
|
From Malik:
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?
Answered by Penny Nom. |
|
|
|
|
|
|
How far away is the horizon? |
2008-06-13 |
|
From Ali:
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!
Answered by Penny Nom. |
|
|
|
|
|
|
How many yards of concrete will I need? |
2008-06-12 |
|
From Ron:
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.
Answered by Harley Weston. |
|
|
|
|
|
|
-2(x - 1)^2 + 8 |
2008-06-12 |
|
From kasondra:
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
Answered by Penny Nom. |
|
|
|
|
|
|
If the arc is 75mm, what is the radius? |
2008-06-12 |
|
From malcolm:
If the are is 75mm, what is the radius?
Answered by Janice Cotcher and Harley Weston. |
|
|
|
|
|
|
tan(4a - b) |
2008-06-12 |
|
From A student:
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
Answered by Harley Weston. |
|
|
|
|
|
|
The current in a river |
2008-06-12 |
|
From Joi:
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.
Answered by Harley Weston. |
|
|
|
|
|
|
Percent improvement |
2008-06-12 |
|
From JOHN:
IF YOU HAD A RATE OF 678/HOUR AND YOUR NEW RATE/HOUR
IS NOW 1961 WHAT IS PERCENT OF IMPROVEMENT
Answered by Penny Nom. |
|
|
|
|
|
|
Two rhombi |
2008-06-12 |
|
From Malik:
("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 ?
Answered by Penny Nom. |
|
|
|
|
|
|
The rate of change in the depth of the water |
2008-06-12 |
|
From Liz:
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?
Answered by Harley Weston. |
|
|
|
|
|
|
Scientific notation |
2008-06-11 |
|
From ASTRID:
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?
Answered by Penny Nom. |
|
|
|
|
|
|
The length and width of a rectangle |
2008-06-11 |
|
From gregg:
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?
Answered by Penny Nom. |
|
|
