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A 5 button lock |
2008-01-02 |
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From mandy:
i have a problem. I have a 5 button lock.and i seem to have forgotten
the combination. You can only push each button once but you can push
more than one button at a time and you don't have to use each button
but i am pretty sure i used all five. for example it can be
1,2,3,4,5 or 1,2&3,4,5. I was wondering if anyone can get me a list of
all the possibilities because i really need to get the box open.
Answered by Penny Nom. |
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The median |
2008-01-02 |
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From tanya:
A triangle has vertices at A(-3, 2) B ( -5,-6) and C (5,0)
Find the equation of the line containing the median from the vertex A.
Answered by Stephen La Rocque. |
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Multiplying exponentials |
2008-01-02 |
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From jessie:
Can you please explain how to put x^3 y^2 times x^1 y^3 in simplest exponential form?
Answered by Penny Nom. |
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Radicals in exponential form |
2008-01-02 |
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From Andre:
The title of the section in my textbook is to write each of the following
radicals in exponential form.
My question is how do u write the squareroot of 10 in exponential form?
Answered by Penny Nom. |
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How much did she invest? |
2008-01-02 |
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From victor:
Sue invested $10,000,part at 4.8% annual interest and the balance at 7% annual interest. How much is invested at each rate if a 1-year interest payment is $645.66.
Answered by Penny Nom. |
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Practical applications of sequences |
2008-01-01 |
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From carl:
can you give me examples of different kinds of practical applications of sequences?
Answered by Penny Nom. |
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racine carre de 9 |
2008-01-01 |
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From hichem:
racine carre de 9
Answered by Claude Tardif. |
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Lining up coins visually using geometry and trigonometry |
2007-12-31 |
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From Jessica:
a) In what order would you arrange a penny, a nickel, a dime, a quarter, and a half-dollar so that they all have the same apparent size? The diameters of the coins, in thousandths of inches, are as follows: penny, 750; nickel, 835; dime, 705; quarter, 955; half-dollar, 1205.
b) How should the coins be placed, if the distance between the dime and the half-dollar is 100 units?
How far from thw dime should your eye be to see that all the coins have the same apparent size?
c) What angle do the coins subtend when they have the same apparent size?
Answered by Stephen La Rocque. |
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Ordering fractions |
2007-12-31 |
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From MARLYN:
Which list shows number in order least to greatest?
A. 07;2/3. 1/5;0.6
B 1/5;06; 07;2/3
C 1/5; 06; 2/3;0.7
D 2/5;0.6; 1/5;0.7
Answered by Penny Nom. |
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A spherical bubble gum bubble |
2007-12-31 |
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From Houston:
Bazooka Joe is blowing a spherical bubble gum bubble. Let V be the volume in the bubble, R the inside of the bubble, and T the thickness of the bubble. V, T, and R are functions of time t.
(a) Write a formula for V in terms of T and R. Hint: Draw a picture
(b) Assume that the amount of bubble gum in the bubble is not changing. What is V'(t)?
(c) After 5 minutes of blowing a bubble gum bubble, the bubble is 3ft in diameter and .01 feet thick. If the inside radius of the bubble is expanding at a rate of .5 feet per minute, how fast is the thickness changing? Hint: Remember that the volume of gum in the bubble does not change over time.
Answered by Harley Weston. |
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Adding fractions |
2007-12-31 |
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From Lisa:
As an educator in Adult Education, I am preparing a young man for a US Government test. The equation I have trouble with is explaining the following equation. It asks: If it takes A 3 days to dig a certain ditch, whereas b can dig it in 6 days, and C in 12, how long would it take all three to do the job? I know the equation is 1/3 + 1/6 + 1/12 and it equals = 7/12 but I don't understand how it equals 7/12. This simple math eludes me. So the question is not the final answer of 1 and 5/7 of days but where one comes up with the 7/12?
Answered by Penny Nom and Claude Tardif. |
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A rectangle is three times as long as it is wide. |
2007-12-31 |
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From Robert:
A rectangle is three times as long as it is wide. If the length is decreased by 2 cm and the width is increased by 3 cm, the new rectangle has an area of 42 cm. What are the dimensions of the original rectangle?
Answered by Penny Nom. |
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Bingo cards |
2007-12-30 |
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From Martin:
I'm trying to produce bingo cards.
There are only 4 numbers on each bingo card.
The numbers are between 1 and 12.
How do i produce as many bingo cards as possible without duplicating number combinations?
Answered by Victoria West. |
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The surface area of the rectangular solid |
2007-12-30 |
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From Sara:
For my math homework i found the volume of a rectangular solid whose deminsions were in feet and the numbers were 10 by 20 by 30
10 = hight
20 = short side base
30 = long side base
and now i have to find the surface area of the rectangular solid....
i know how to do this but i can't get the right answer
it should be 2,200 ft squared but i keep getting 13,00 feet squared
Answered by Penny Nom. |
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The integral of 1/ (x(x+1)^0.5) |
2007-12-29 |
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From Nooruddin:
Integral of
dx / x(x+1)^0.5
(boundaries are 5 and 3)
Answered by Harley Weston. |
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