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[(400/n)-5](n+ 4)=400 |
2006-07-02 |
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From Maria and George:
Can somebody solve for n in the following equation please?
[(400/n)-5](n+ 4)=400
Answered by Penny Nom. |
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Some plumbing calculations |
2006-07-02 |
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From Steve:
I am preparing to write my journeyman plumber ticket and would appreciate answer/solutions to the following math questions along with the formula to solve them
- A range boiler is 16 in. in diameter and 4 ft high. How many gallons will it hold ?
- What would the weight in Kg be if the pipe was .4 of a meter in diameter and it was 8.6 m in length
- An oil storage tank is 4 m in diameter and 6 m high. How , many liters of oil can be stored
I thank you in advance for your help ... all math books I have are US and nothing is Metric
Answered by Stephen La Rocque and Penny Nom. |
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A goods and Services Tax calculation |
2006-07-01 |
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From Carol:
If I have $1700 how much of that is GST? Before the GST was changed to 6% you would multiply $1700 by .06542. Now what number do you multiply for 6% GST. No PST involved.
Answered by Penny Nom. |
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A number puzzle |
2006-06-30 |
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From Atitya:
The diagram given below consist of seven line segments and six circles,place the numbers 1 to 13 on either a line or a circle in such a way that the numbers on each segment is the difference of the two at its end points.
Answered by Stephen La Rocque and Penny Nom. |
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Some word problems |
2006-06-30 |
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From Oliver:
Question: I am a father of a 10 years old boy and sending this question from Bangkok, Thailand. I need solutions for the following:
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Joseph and Peter spent $45 altogether.
Joseph and Harold spent $65 altogether.
If Harold spent 3 times as much as Peter, how much did Joseph spent?
I know the answer is $35 but do not know how to get to it.
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Answered by Penny Nom. |
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Order of operations |
2006-06-29 |
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From Jaden:
(1) A triangle has vertices at (-3,-3) (7,-3) and (-2,5). What is the area of the triangle?
Is there a way of doing this so that you dont have to graph it? If the x axis is horizontal can i say it is the base and the y-axis is horizontal meaning the height. Would I be able to do this...-3 to 7-->9 spaces, -3 to 5-->7 spaces-----9(7)63/2=31.5
(2) A cube has a surface area of 54 square centimeters. What is the volume of the cube in cubic centimeters?
Answered by Stephen La Rocque. |
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Order of Operations |
2006-06-29 |
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From Marcy:
I have been having problems with this skill testing question. I know the rules of operation but I don't understand why they would put it in brackets. Can you help me. I have two answers but I would like to know which one is right. Im having a disagreement with a friend over this matter. Thank you so much
[ (20 + 82 - 6) ÷ 16 ] x 14
Answered by Steve La Rocque and Paul Betts. |
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Painting a house |
2006-06-28 |
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From A student:
If Sally can paint a house in 4 hours, and John can paint the same house in 6 hour, how long will it take for both of them to paint the house together?
Answered by Stephen La Rocque and Penny Nom. |
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A percentage question |
2006-06-28 |
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From Terrence:
Given the percentage and the total amount, I need to know how to arrive at the total amount without guessing.
Example: 25\% of what is $298,750.00
Answered by Stephen La Rocque. |
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Marking out a circle |
2006-06-28 |
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From Peter:
given a straight line. how do i work out the off sets ( at right angles) at several intermediate points. to set out a 5.0m arc that has a 18.0m radius.
Answered by Stephen La Rocque and Penny Nom. |
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The volume of a building |
2006-06-28 |
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From A student:
a building is 8 feet wide and 16 feet long. it has a flat roof that is 12 feet high at one corner, and 10 feet high at each of the adjacent corners. what is the volume of the building?
Answered by Penny Nom. |
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The area of a house |
2006-06-28 |
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From Michael:
I would like to know how to measure the area of a house?
Answered by Penny Nom. |
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livinia the housefly finds herself caught in the oven |
2006-06-27 |
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From Danielle:
livinia the housefly finds herself caught in the oven at the point (0,0,1). the temperature at the points in the oven is given by the function
T(x,y,z) = 10 (xe(-y2) + ze(-x2))
where the units are in degrees celsius.
(i.)so if livinia begins to move towards the point (2,3,1) at what rate in deg/cm does she find the temp. changing?
(ii.)in what direction should she move in order to cool off as rapidly as possible?
(iii.)suppose that livinia can fly at a speed of the square root of 2 (cm/sec.) if she moves in the direction of part (ii) at what rate will she find the temp. to be changing?
Answered by Penny Nom. |
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I have a ditch how many tons of dirt will it take |
2006-06-25 |
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From Scott:
I have a ditch 200 feet long 10 feet wide and 5 feet deep.How many tons of dirt will it take to fill it?
Answered by Stephen La Rocque. |
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An octagon shape flower bed |
2006-06-24 |
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From Brandy:
hello my name is brandy my husband and I would like to build an octagon shape flower bed to put around the tree in the front yard
we would hope to have the whole shape about 4 ft-5 ft around the tree. what would be the way to find out how to cut each side to that they fit together equally
Answered by Penny Nom. |
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