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More on the gst |
2009-02-23 |
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From melissa:
I need to know the amount of gst that was in the amount of 630.67? How do you figure this out? I don't need the amount of gst after, but the gst included?
Answered by Penny Nom. |
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Calculs de minutes en heures |
2009-02-23 |
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From Denis:
Je suis en train de suivre un cours en navigation maritime et je dois changer
souvent des minutes en heures. ex: 495 minutes = ?h??
Je désire avoir le cheminement le plus simple a faire pour ce type de calcul.
Je ne travail pas avec excell. Je veux une formule a faire seulement avec
une calculatrice élémentaire. Merci pour votre aide, j'apprécie beaucoup
votre coup de main. Denis.
Answered by Claude Tardif. |
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Hauteur d'un tétraèdre |
2009-02-23 |
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From Sébastien:
Bonjour;
J'ai trouvé un exercice de maths sur internet pour m'entraîner, j'ai bientôt fini, il me manque juste la dernière question à laquelle je bloque. Voici l'énoncé :
Sur les arêttes d'un cube, on marque les points I, J et K tels que Ai=AJ=AK=x, où x est un réel donné strictement positif et strictement inférieur à la longueur a de l'arête du cube.
La question 1) disait que le triangle IJK est équilatéral et que son aire est de( x² racine de 2)/2.
La question 2) disait que AIJK est un tétraèdre et que son volume est de (x au cube) /6.
Et la question où je bloque :
3) La perpendiculaire menée par A au plus (IJK) coupe ce plan en H. Calculer AH en fonction de x.
Merci de votre aide!
Bonne journée.
Answered by Claude Tardif. |
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An octagonal poker table |
2009-02-23 |
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From Corey:
I'd like to build an octagonal poker table using 4'x8' sheets of plywood. I would like each side edge to be approx. 2' wide. I am sure that due to the angles I can do this with one sheet of plywood, but i don't know how to measure for this. Can you help?
Answered by Robert Dawson and Harley Weston. |
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Amount of Water |
2009-02-23 |
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From Jeanette:
I received a water bill for 660,000 gal. of water. I don't think it is possible to pass this much water through a 1 1/2 inch pipe in 30 days. Is it possible to send that much water? I am assuming that there is a water pressure of 50 gpm, but I am not sure of that. It is a rural water system.
Answered by Janice Cotcher & Robert Dawson. |
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Buying 13,983,816 tickets for the 6/49 lotto |
2009-02-23 |
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From luis:
if 6/49 lotto combinations is 13,983,816 combinations at 10.pesos per combinationthe price amount is 139,838.160.00 is it wise for me to get all the combinations since the the pot money is more than 347 million pesos. Am I right?
Answered by Robert Dawson and Penny Nom. |
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Augmented matrix: independent, dependent, or inconsistent? |
2009-02-23 |
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From Anna:
Perform row operations on the augmented matrix as far as necessary to determine whether the system is independent, dependent, or inconsistent.
x + y + z = 11
x - y + 3z = 5
2x + 2y + 2z = 15
Answered by Harley Weston. |
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Pressure at Given Depth |
2009-02-22 |
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From Tamara:
A sea is 3km deep. The average density of sea water there is 1020 kg/m^3. What is the water pressure at the bottom?
Answered by Janice Cotcher. |
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Time in a Swing |
2009-02-22 |
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From Barb:
I looked at the questions concerning a pendulum as I know I need to use this formula but I am stiil not able to figure this problem out. Can you help?
If a child is on a swing with a 10 foot chain, then how long des it take to complete one cycle of the swing?
I know I am suppose to use the formula 8T^2 = pi^2 L but I do not understand how to do this.
Thanks
Answered by Janice Cotcher. |
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Intercepts in a Quadratic Function |
2009-02-22 |
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From Barb:
I have a question I need help with please. What are the number of x and y intercepts that quadratic function can have and why?
Thanks.
Answered by Janice Cotcher. |
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Surface area of a cube |
2009-02-22 |
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From JOHNNIER:
determine the surface area of a cube with volume 125 mm3, thank u very much
Answered by Penny Nom. |
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Percentage difference in pipe volumes |
2009-02-22 |
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From mike:
what is the % difference between a 3 inch diameter pipe compared to a 4 inch diameter pipe? and how do i find the answer?
Answered by Penny Nom. |
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16 golfers playing one round of golf on each of four days |
2009-02-22 |
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From Jim:
I have seen solutions for other combinations of setting up a golf trip but I haven't seen one for my group. We have 16 golfers playing one round of golf on each of four days. Is there a way for all of them to play in foursomes so that everyone gets to play with everyone else? Thanks for your consideration.
Answered by Chris Fisher. |
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Express the HCF of 1232 and 573 as 1232x + 573y = 1 |
2009-02-22 |
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From Anonymous:
Express the HCF of 1232and 573 as 1232x + 573y = 1.
Answered by Victoria West. |
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A ¾ inch copper pipe |
2009-02-22 |
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From Ray:
Hi
Do you have a formula I can use for this problem? And how to use it.
Thank You
How many feet of ¾ inch copper pipe will it take to hold 3 gallons of water?
Answered by Harley Weston. |
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