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How many 4x4 tiles would I need for 10 sq ft? |
2010-01-04 |
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From Chris:
how many 4x4 tiles would I need for 10 sq ft
Answered by Robert Dawson. |
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The maximum area of a rectangle |
2010-01-03 |
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From Mohammad:
determine the maximum area of a rectangle with each perimeter to one decimal place?
a)100 cm b)72 m c)169 km d)143 mm
Answered by Penny Nom. |
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Profit increase from 10% to 15% |
2010-01-03 |
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From taha:
A shopkeeper sold a pen for $13.20 to a make a profit 10 percent.In order to earn a profit of 15 percent,he should have sold it for?
Answered by Penny Nom. |
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The height of an arch |
2010-01-02 |
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From kamer:
given the radius 1.696 also the cord length 1.958 find the height between the cord and the arch.
Answered by Penny Nom. |
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The height of a mountain |
2010-01-02 |
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From Aye:
In order to decide the height of a remote mountain peak T one measures from two points A and B the angles u and v where the lines AT and BT made with the Horizontal plane respectively. From B, which lies 2400 m from A, one can see A and T by the same point of the compass. Find the height of a mountain peak, if A and B are known to be 950 m and 875 m above sea level respectively, as well as u = 43,8 degree and v = 25,2 degree.
Aye
Answered by Harley Weston. |
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Four digit numbers with no repeats |
2010-01-02 |
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From Daniel:
I want to know how many different numbers there would be between the numbers
0000-9999 that do not have any numbers that duplicate or repeat in the number? For example
the first number would have to be 0123 and the last would be 9876 (I think) Thanks!
Answered by Penny Nom. |
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Write a function for the area in terms of x |
2010-01-01 |
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From Almarie:
Lauren has 40 feet of metal fencing material to fence three sides of a rectangular garden. A tall wooden fence serves as her fourth side. Write a function for the area of the garden A in terms of x, the width in feet.
Answered by Penny Nom. |
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The volume of an ellipsoid |
2010-01-01 |
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From Barbara:
I need to calculate the volume of an ellipsoid with the dimensions:
102.5 mm x 57 mm x 57 mm = L x W x H
I am using the formula V = 4/3 pi (.5L)(.5W)(.5H), but it isn't giving me a reasonable
number.
Answered by Penny Nom. |
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A question from a boat builder |
2010-01-01 |
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From Grant:
I am a boat builder, trying to lay out shape of side's elevation.
My question is, how do I define the length of a circle's radius, if I know the chord length
(20 ft) and the segment of the radius between the chord and the circle is known (7 inches)?
Answered by Penny Nom. |
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The minimum point of a quadratic |
2009-12-31 |
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From rachel:
y=0.0008x^2-0.384x
What is the minimum point of this equation?
Answered by Penny Nom. |
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A linear equation with fractions |
2009-12-31 |
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From Michelle:
How would I solve: (-2)(-1/2x + 5) = (-2)(8)?
Answered by Penny Nom. |
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Chord length given the length & radius of an arc |
2009-12-31 |
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From Wayne:
Given the length & radius of an arc, is there a formula that will accurately calculate the chord length?
I'm an architectural designer, and would need it explained in layman's terms. Thank you.
Wayne
Answered by Penny Nom. |
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The volume of a frustum |
2009-12-29 |
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From dave:
I have a frustum top 1.7r bottom .55r and 2.14 h
I have to calculate cement in a silo every week.
I am not very good at maths but i have been adding the top and bottom
to get an average so as to turn it into a cylinder and i come up with
8.5m3 I know that the correct volume is 9.24 m3. Can you tell me why
getting an average width on the top and bottom of a frustum doesn't work.
Thank you.
Answered by Chris Fisher. |
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Linear programming using the Simplex Method |
2009-12-28 |
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From William:
A gold processor has two sources of gold ore, source A and source B. In order to keep his plant running,
at least three tons of ore must be processed each day. Ore from source A costs $20 per ton to
process, and ore from source B costs $10 per ton to process. Costs must be kept to less than $80 per day.
Moreover, Federal Regulations require that the amount of ore from source B cannot exceed twice the
amount of ore from source A. If ore from source A yields 2 oz. of gold per ton, and ore from source B
yields 3 oz. of gold per ton, how many tons of ore from both sources must be processed each day to
maximize the amount of gold extracted subject to the above constraints?
I need a linear programming solution or algorithm of the simplex method solution.
Not a graphical solution. Thanks.
Answered by Janice Cotcher. |
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Summation Notation |
2009-12-28 |
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From MANDIRA:
I want to get the formula for expressing one number by summation of consucutive numbers .
Answered by Janice Cotcher. |
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