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Can the result of the calculation be 2? |
2012-02-09 |
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From Thomas:
You have the digits 2, 2, 3, 3, 4, 4, 5, 5, 6, 6, 7, 7, 8, 8, 9, 9 in a random order side by side and put randomly between two digits a colon, so that a division comes into existence. Can the result of the calculation be 2?
Answered by Chris Fisher. |
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Litres in a box |
2012-02-09 |
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From vicky:
how much litre water can be filled in a box of 12 inches *24 inches *12inches
Answered by Penny Nom. |
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Two circles |
2012-02-08 |
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From crisfe:
find the point where the common cord of the circles x2+y2=25, x2+y2-12x-6y+35=0 process there line centers. what point they intercepts?
Answered by Penny Nom. |
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A tree growth modelled by a geometric series |
2012-02-08 |
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From Steph:
Hi I am really struggling with this question please help !!!!
a pohutukawa tree is 86 centimetres when it is planted. in the first year after it is planted , the tree grows 42 centimetres in height.Each year the tree grows in height by 95% of the growth of the previous year.
assume that the growth in height of the pohutukawa tree can be modelled by a geometric sequence.
A)find the height of the tree 5 years after it is planted and figure out the maximum height the pohutukawa tree is expected to reach in centimetres
Answered by Penny Nom. |
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Wallpapering a room |
2012-02-08 |
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From jimmy:
Ms. Frank is going to
wallpaper a living room with dimensions
24 feet long, 18 feet wide, and 8 feet
high. What surface area does Ms. Frank
plan to wallpaper?
Answered by Penny Nom. |
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The curvature of the earth |
2012-02-08 |
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From sean:
Question from sean, a student:
Two people 1.8 metres tall walk directly away from each other until they can no longer see each other (due to the curvature of the earth, which has a radius of about 6378 km).
A) Find a function relating the height of two identical objects with the distance between them using the scenario above as an example.
B) Sketch this function (you may use Graphmatica if you wish). Over what domain and range does the function exist?
C) Describe this relation in practical terms.
Answered by Harley Weston. |
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A road around a garden |
2012-02-07 |
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From Manu:
Inside a square garden of side 158m, a road 4m wide is built all around. What is the area of the remaining part of the garden?
Answered by Penny Nom. |
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The volume of a round tube |
2012-02-07 |
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From I.C:
I need to find out how long a 10" round tube needs to be in order for there to be .95 cubic feet of air space
Answered by Harley Weston. |
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38/50 as a percent |
2012-02-06 |
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From 2:
38/50 in a percent
Answered by Penny Nom. |
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Expressing 0.5% |
2012-02-06 |
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From Kenneth:
Hello:
It is correct to express 0.5% as 5 tenths of one percent.
Is it also correct to express 0.5% as 5 tenths of one-hundred percentage points or 5 tenths of one percentage point?
I think it would be 5 tenths of one percentage point because 5 tenths of one-hundred percentage points would be 50 percentage points, but I'm not sure.
I thank you for your reply.
Answered by Penny Nom. |
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Notation for the second derivative |
2012-02-06 |
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From Shafira:
In all math textbooks, it is written that d/dx ( d/dx) (y)= d2y/dx2. Why do they write it as d2y/dx2, not as d2y/d2x2?
Answered by Robert Dawson. |
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A quartic polynomial that is a perfect square |
2012-02-05 |
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From archit:
If P(x)=x^4+ax^3+bx^2-8x+1 is a perfect square then (a+b)=?
Answered by Penny Nom. |
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Two sectors of a circle |
2012-02-03 |
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From Wayne:
I am not even sure what to ask. I have to two lengths of feet and an angle of degrees, and I have to find the area?
**Problem attached
Thanks,
Wayne
Answered by Penny Nom. |
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A rectangular block and a sphere |
2012-02-02 |
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From snehal:
a solid rectangular block of metal 49 cm. by 44cm. 18cm. is melted and formed into a solid sphere, find the radius of the sphere[22/7]
Answered by Penny Nom. |
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There is a police officer in pursuit of suspect |
2012-02-01 |
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From Jay:
There is a police officer in pursuit of suspect. They suspect is driving on a straight road traveling at 79 mph, the officer is 233 yds away, traveling at 92 mph, the suspects car 5 ft long and the officers car is 5.3 ft long, how long will it take to have the front of the officers car, equal to the front of the suspects car down to the tenth of a second.
Answered by Harley Weston. |
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