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Direct variation 2007-05-07
Jennifer pose la question :
assume that y varies directly as x. find y when x = 54 if y =1/4 when x=3/2
Stephen La Rocque lui répond.
Percent 2007-05-07
Art pose la question :
what percent of 85 is 17?
Stephen La Rocque lui répond.
Are proofs important in geometry? 2007-05-07
BJ pose la question :
Are proofs very important to know how to do?
My daughter has been in Geometry & the teacher skipped proofs.

Penny Nom lui répond.
Gardening mixtures 2007-05-07
Dan pose la question :
A mixture of 1 part sulfur and 2 parts lime is added to soil as an amendment to prevent blossom end rot in tomatoes and green peppers. One Tablespoon of the above mixture is added to each hole prior to planting (using the comparative standard of 1 Tablespoon [US] = 0.5 ounce [US liquid]). How many ounces of each component must I mix to have an adequate amount to add to 150 planting holes?
Stephen La Rocque lui répond.
Probability of H.I.V. tests 2007-05-07
Danielle pose la question :
A medical test detects H.I.V. Among those who have H.I.V., the test will detect the disease with probability 0.95; among those who do NOT have H.I.V., the test will falsely claim that H.I.V. is present with probability 0.0125. Among those who take this test, 4% have H.I.V. The test is given to Lucille, and indicates that she has H.I.V. What is the probability that Lucille actually has H.I.V.?
Stephen La Rocque lui répond.
Probability 2007-05-07
Danielle pose la question :
A box contains 3 defective lights and 5 non-defective lights. The lights are tested one at a time without replacement. What is the probability that the 3 defective bulbs will be found in the first 3 tests? is it 1/56 by chance?
Stephen La Rocque lui répond.
Area of region between circle and inscribed octagon 2007-05-07
amy pose la question :
I have to find the area of the shaded region where there is an octagon inscribed in a circle The radius is 4 inches. The shaded region is everything besides the octagon inside the circle. How can I find the area of the shaded region? Thank you!
Stephen La Rocque lui répond.
How many sales does she need? 2007-05-07
Jimi pose la question :
The new businessperson hopes to earn $50,000 per year. The profit percentage for this type of business is typically 10%. How much must sales be?
Stephen La Rocque lui répond.
A problem involving squarefree integers 2007-05-07
Andrew pose la question :
I was told that if x > y (integers); then x would never exactly = divide y^n (n integer > 1) if (x,y) =3D 1 ; or if x is "square = free". Is the latter true and why?
Stephen La Rocque and Penny Nom lui répond.
Slicing a double-napped cone with a plane 2007-05-07
Andrew pose la question :
I am writing a paper about creating parallel lines by slicing a double-napped cone with a plane. I have found out how it can be shown by algebra that the equations for parallel lines are generated from the degenerate case of a second degree polynomial in two variables, but I have yet to find a source with a visual representation of this case. Do you know if it exists?
Chris Fisher lui répond.
The radius of a cone 2007-05-07
Braden pose la question :
i need to find the surface area but i only have the slant height and the height i need the radius how do i find it?
Penny Nom lui répond.
The dimensions of a rectangle 2007-05-07
Stephanie pose la question :
The perimeter of a rectangle is 54yds , and the area of the rectangle is 180yds^2 . Find the dimensions of the rectangle.
Penny Nom lui répond.
Road incline grades 2007-05-07
cecil pose la question :
convert grade percent to degrees
Stephen La Rocque lui répond.
Average 2007-05-06
michelle pose la question :
the average of x and y is 20. If z = 5, what is the average of x, y, and z.
Stephen La Rocque lui répond.
The circumference of part of a circle 2007-05-06
Wallis pose la question :
I have more then a quater of a circle, but less than half. What is the circumference if the two side are 7cm and the angle between them is 110 degrees?
Penny Nom lui répond.
 
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