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Four carpenters can build eight houses in 10 days. |
2011-11-23 |
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From Kenneth: Four carpenters can build eight houses in 10 days.
Two carpenters can build how many houses in 15 days? Answered by Penny Nom. |
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A railway bridge over a road is in the shape of a parabola |
2011-11-23 |
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From Brennen: A railway bridge over a road is in the shape of a parabola,
and the bridge is 3 m high in the middle and 6 m wide at its base.
A truck that is 2m wide is approaching the bridge.
What is the maximum height that the truck can have and
still pass under the bridge? Explain.
Thank you!! Answered by Penny Nom. |
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The average age of 300 cars |
2011-11-22 |
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From Jason: I have 300 used cars built from 1970 to 1980, I would like to know the average
age by total volume. If I provide the qty built per year, can I determine the average age of the lot (300) by total volume?
Total built |
50 |
56 |
30 |
10 |
30 |
25 |
64 |
9 |
12 |
14 |
Year built |
1971 |
1972 |
1973 |
1974 |
1975 |
1976 |
1977 |
1978 |
1979 |
1980 |
Thanks Answered by Penny Nom. |
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The units digit of a prime number |
2011-11-22 |
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From Mike: Every prime number larger than 10 has a digit in the ones place that is included in which set of numbers below?
A. 1,3,7,9
B. 1,3,5,9
C. 0,2,4,5,6,8
D. 1,3,7 Answered by Penny Nom. |
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The acreage covered by a berm |
2011-11-21 |
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From Katherine: I need to know how to figure the acreage a berm might cover. Berm size is 815 ft. long with a 5' height average at a 3:1 slope It will have a 4 ft. top.
Also how do you figure how wide a base would be for a berm at a 3:1 slope? I am thinking for every 3 ft horizontal I need to go 1 foot vertical starting from the center out. Is this only half the berm and need to mirror it for the other side to get a total base width? Answered by Penny Nom. |
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The height of a flag pole |
2011-11-21 |
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From Micah: A flagpole stands vertically at the edge of a roof of a building 200 ft high. the angle of elevation of the pole from a point 100 ft from the bottom of the building is 67 degrees. Find the length of the pole in meters. Answered by Penny Nom. |
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Water pouring into a conical tank |
2011-11-21 |
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From Patience: Hi my name is patience and I'm having a problem with this question.
Water pours into a conical tank of semi vertical angle 30 degrees at the rate of 4 cm^3/s, where h is the depth of the water at time t. At what rate is the water rising in the tank when h = 10 cm?
Thank you Answered by Penny Nom. |
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Reducing by a scale factor of 1/3 |
2011-11-21 |
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From Sandra: A rectangle with the dimensions of 6.3 cm and 5.8 cm is reduced by a scale factor of 1/3. What are the dimensions of the new image? Answered by Penny Nom. |
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2 + f(x) and f(x) + 2 |
2011-11-21 |
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From Beth: Do you do y=2+f(x) the same way as if the 2 came after the equation such as y=f(x) +2 when graphing? Answered by Penny Nom. |
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A triangle problem |
2011-11-20 |
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From May: In triangle ABC, AB=AC, angle A=20,
D lie on AB making DC=AD,
E lie on AC making angle EBC=70.
Find angle DEB. Answered by Chris Fisher. |
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In how many ways can 12 members of volleyball team line up ... |
2011-11-18 |
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From Aatir: In how many ways can 12 members of volleyball team line up if the captain and assistant captain have to remain together. Answered by Penny Nom and Stephen La Rocque. |
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15 pigs and 6 pens |
2011-11-16 |
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From Mike: I have 15 pigs and 6 pens, I have to put them in odd numbers, how do I do it. Answered by Chris Fisher. |
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Ordering Fractions |
2011-11-16 |
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From Chloe: hey okay im having trouble with a math question. how do you put these fractions in number order
8/14 11/28 3/7 Answered by Jaymi Schmidt. |
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Ordering fractions |
2011-11-16 |
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From Laya: Order from least to greatest
2/3, 1/2, 5/12 Answered by Jaymi Schmidt. |
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The 3, 4, 5 right triangle |
2011-11-15 |
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From rishil: to the nearest degree,what is the measure of the smalles angle in a rightt triangle with sides of length 3,4 and 5? Answered by Penny Nom. |
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