10 items are filed under this topic.
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A clock takes 3 seconds to strick the hour of 3 o'clock |
2012-03-09 |
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From saptarshi:
[ A clock takes 3 seconds to strick the hour of 3 o'clock. How many seconds will it take to strick 9 o'clock?]
Answered by Robert Dawson. |
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The volume of a compost pile |
2009-12-11 |
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From Tim:
I have a pile of compost that is78 feet long by 18 feet wide at base by 9
feet tall to a point. At the width it looks like a triangle
I'm looking for the square yards
Thanks
Answered by Penny Nom. |
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Zip codes, postal codes and 5 digit codes |
2008-07-08 |
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From Mike:
Sorry if you have answered this before but I don't understand the explanations I have seen.
How many possible combinations are in a 5 digit code (like a Zip Code). Is there an equation that can be used for this type of question?
Answered by Penny Nom. |
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A pen with 40 post on each side |
2008-03-18 |
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From Manpreet:
how many post do you need to make a pen with 40 post on each side
Answered by Penny Nom. |
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How many locations for the lampposts are possible? |
2007-01-21 |
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From Madeeha:
Maria's backyard has two trees that are 40 feet apart, as shown in the accompanying diagram. She wants to place lampposts so that the posts are 30 feet from both of the trees. Draw a sketch to show where the lampposts could be placed in relation to the trees. How many locations for the lampposts are possible?
Answered by Penny Nom. |
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The dimensions of a poster |
2006-03-08 |
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From Sonu:
poster measures 150cm by 180cm is enlarged in the ratio 8:5 find the length and breath of the enlarged poster.
Answered by Stephen La Rocque. |
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A rope around a post |
2002-07-15 |
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From Nic:
My daughter who is in the 10th grade asked me this ?, you have a pole 45 inches high, 22inches around. You have a rope 1/2 thick, how many feet of rope would you use to go from top bottom of pole to top.
Answered by Penny Nom. |
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Three problems |
2001-10-28 |
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From Brenda:
- Joseph is planting bushes around the perimeter of his lawn. If the bushes must be planted 4 feet apart and Joseph's lawn is 64 feet wide and 124 feet long, how many bushes will Joseph need to purchase?
- The cost of a long distance phone call is $1.50 for the first two minutes and $0.60 for each additional minute. How much will Maria pay for a 24 minute phone call?
- Find the next three numbers in the pattern. 1,3,7,15,31,___,____,___.
Answered by Penny Nom. |
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The height of the lamppost |
2001-10-02 |
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From Werner:
I am working on question 51,section 3.7 ,page 191 of Stewart's Single Variable Calculus. The question involves a lamp post which is casting a shadow around the eliipse whose formula is x2 + 4*y2 = 5. I have found the derivative of the elllipse both explicitly: x/4(((5-x2)/4)0.5) and implicitly : y' = - x/(4*y).
Answered by Harley Weston. |
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A lampost and its shadow |
2000-12-24 |
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From Laura:
A lamppost line EC casts a shadow line AC. A 30 cm ruler line DB has been moved from A so that it's shadow falls just within the shadow of the lamppost. - Suppose the length of the ruler's shadow is 42 cm. What is the slope of the imaginary line AE?
- Suppose the lamppost's shadow is 15 m. long. How tall is the lamppost?
Answered by Penny Nom. |
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