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Given the arc length and chord length, what is the radius? |
2007-10-10 |
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From Wayne:
I have the actual length of an arc plus the length of the cord. How do I determine the radius of the arc.
Answered by Harley Weston. |
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Parabolic suspension bridge |
2007-10-09 |
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From Jessica:
A suspesion bridge with weight uniformly distributed along its length has twin towers
that extend 75 meters abouve the road surfce and are 400 meters apart.The cables are
parabolic in shape and are suspended from the tops of the towers. The cables touch the road
surface at the center of the bridge. Find the height of the cables at a point
100 meters from the center. (Assume that the road is level.)
Answered by Stephen La Rocque. |
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La somme des «N» premiers nombres naturels impairs |
2007-10-09 |
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From Dominique:
Quelle expression algebrique représente la somme des «N» premiers nombres naturels impairs ?
Answered by Claude Tardif. |
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Simplifying algebraic expressions |
2007-10-09 |
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From Sakeena:
(2^2*3)^x+1/2^2x*3x
Answered by Stephen La Rocque. |
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Parabolic arch |
2007-10-09 |
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From Nisa:
A parabolic arch has a span of 120 feet and a maximum height of 25 feet. Choose suitable rectangular coordinate axes and find the equation of the parabola.
Then calculate the height of the arch at points 10 feet,20feet,and 40 feet from the center.
Answered by Stephen La Rocque. |
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Base 10 to base 5 |
2007-10-09 |
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From Angela:
I've been searching online for the past week and I cannot find an Algorithm to convert from base 10 to base 5. Can anyone give me a step-by-step instruction on how to do this?
Answered by Stephen La Rocque. |
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Simplifying rational expressions |
2007-10-09 |
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From Bama:
x(x-2)+1 divided by x^2-3x+2
Answered by Stephen La Rocque. |
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Subtracting rational expressions |
2007-10-09 |
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From Pamela:
Subtract:
6p – w __ 4c + p
w – 4 w – 4
Answered by Stephen La Rocque. |
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Mixing cement |
2007-10-09 |
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From Sandra:
How many bags of cement do I need for a floor for a house that is 8meters long, 8meters wide and 50cm deep.
Answered by Stephen La Rocque. |
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Factoring quadratics |
2007-10-09 |
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From Abbie:
I have two problems same topic. I belive they cannot be factored but i want to make sure.
x2+6x-40
x2-20x+99
Answered by Penny Nom. |
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calculating percentages for my class |
2007-10-09 |
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From Cori:
I teach a class in which there are seven projects/quizzes worth 10% each,
and the midterm and the final are each worth 15%. No problem figuring out
their final grade, but I have to give a mid-term average, having only FOUR
of the seven 10% things, and the midterm test. The closest I've come to
an accurate "average" is to just add them together (as equals) and average them.
Answered by Victoria West & Harley Weston. |
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Area and side length of a hexagonal tent |
2007-10-09 |
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From Mark:
Trying to buy a tent with 6 sides, in the catalog they give me sq. ft., what is the distance from side to side of a hexagonal tent with an area of 90 sq. ft.
Answered by Stephen La Rocque. |
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Grouped data |
2007-10-08 |
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From Nimra:
The following sets of data represent the distributions of
house prices in the north-east and south-west of a country.
Random samples of 100 houses were selected in each region.
(a) Calculate the mean, median and standard deviation for
Answered by Harley Weston. |
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Coin jar |
2007-10-07 |
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From a student:
Sally empties his jar of coins. It contains $3.75 in nickels, dimes, and
quarters. The number of dimes is twice the number of nickels and the number
of quarters is three less than the number of nickels. Determine how many nickels,
dimes, and quarters were in the in the jar.
Answered by Stephen La Rocque. |
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Doubling every day |
2007-10-07 |
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From Jerrie:
Patti saved pennies for 10 days. The first day she saved 1 cent. Every day after that she saved twice as much as the day before. How much money did Patti save altogether?
Answered by Stephen La Rocque. |
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