 |
|
|
|
|
|
|
|
|
The dimensions of a rectangle |
2011-05-08 |
|
From yolanda:
If the length of a rectangle is 3ft less than twice its width and the area of the rectangle is 54ft^2,what are the dimensions of the rectangle?
Answered by Penny Nom. |
|
|
|
|
|
|
The volume of a triangular shaped aquarium |
2011-05-07 |
|
From Jeff:
HI, I searched the site but really couldn't find my answer,
at least that I could understand! I have a triangular shaped aquarium
( think of a cube, except its an equal triangle shape). all 3 sides are 48 inches,
and it is 34" tall. Can you please tell me what the volume is in gallons?
Thanks!
Answered by Penny Nom. |
|
|
|
|
|
|
A circle inscribed in a triangle |
2011-05-07 |
|
From Aishwarya:
The angles of a triangle are 50, 60, and 70 degrees, and a circle is touches the sides at A, B, C. Calculate the angles of the triangle ABC.
Answered by Penny Nom. |
|
|
|
|
|
|
The game of 24 |
2011-05-06 |
|
From shaylin:
how do you use 3,9,7,9 once in any operation equal to 24?
Answered by Penny Nom. |
|
|
|
|
|
|
(4x-5)(3x+2)=0 |
2011-05-04 |
|
From Corina:
solve: (4x-5)(3x+2)=0
Answered by Penny Nom. |
|
|
|
|
|
|
The linear thermal expansion of steel |
2011-05-03 |
|
From Scot:
Several questions on your site deal with the linear thermal expansion of steel. Such as how much will a piece of steel grow in length if it is heated. My question is similar but I would like to know if there is a different calculation to determine how much the diameter of a round bar will grow when heated. Can you tell me how I can calculate how the diameter of .500" round steel will increase for every degree of temperature change? If a bar is raised from 60 degrees F to 120 degrees F how much will the diameter change?
Answered by Robert Dawson. |
|
|
|
|
|
|
An exclusion zone around a triangle II |
2011-05-03 |
|
From Aishwarya:
A long time ago Mr gibson found an island shaped as a triangle with three straight shores of length 3km, 4km and 5km. He declared an exclusion zone around his island and forbade anyone to come within 1km of his shore. What was the area of his exclusion zone?
This question was answered but did not understand the explanation.
Answered by Robert Dawson. |
|
|
|
|
|
|
A scale of 1:160 |
2011-05-02 |
|
From Dave:
a 4 foot by 8 foot sheet of plywood is how many acres in a scale (1:160)
Answered by Penny Nom. |
|
|
|
|
|
|
How many students are 25 and under? |
2011-05-01 |
|
From ella:
use the five steps of problem solving to answer the following question
Enrollment at a local university is 8,500. There are one third as many students over the age of25. there are 25 and under. how many students are 25 and under and how many are 25 and older(p 5)
Answered by Penny Nom. |
|
|
|
|
|
|
Three tangent circles |
2011-05-01 |
|
From mark:
Three circles of radii 24 cm, 32 cm, and 42 cm are externally tangent to each
other (each is tangent to the other two). Draw a diagram and using the Law of
Cosines find the largest angle of the triangle formed by joining their centres.
Answered by Penny Nom. |
|
|
|
|
|
|
A trough of water |
2011-05-01 |
|
From alvin:
A trough is formed by nailing together, edge to edge, two boards 11 ft. in length, so that the right section is a right triangle. If a 15 gallon of water are poured into the trough and if the trough is held level so that a right section of water is an isosceles right triangle, how deep is the water? (231cu.in=1 gal.)
Answered by Penny Nom. |
|
|
|
|
|
|
The nth term |
2011-04-30 |
|
From Samantha:
predict the general term, or the nth term, An for the sequence.
1/2,2/3,3/4,4/5,5/6
Answered by Penny Nom. |
|
|
|
|
|
|
The area of a rectangle |
2011-04-30 |
|
From Hayley:
A rectangles width is exactly twice its length. The area of the rectangle is 450 square feet. What are the length
and width of the rectangle?
Answered by Penny Nom. |
|
|
|
|
|
|
Why use percentiles? |
2011-04-29 |
|
From Kenneth:
I need some clarification regarding the word "percentile."
Here is an example and what I know: If an investor had twenty stocks in his portfolio and five of those stocks paid an annual dividend of $200.00 or more, the five stocks are in the 25 percentile.
Why is this word necessary? If my example and explanation is correct, why not simply indicate that 25% of his stocks paid an annual dividend of $200.00 or more?
Answered by Penny Nom. |
|
|
|
|
|
|
Deciding where to bowl |
2011-04-29 |
|
From ella:
the bowling alley on wedge street charges $5.50 for shoe rentals plus $2.50 per game. lawerence bowing alley charges $4.00 shoe rentals and $3.00 per game . how many games should they bowl to make wedge street cheaper than lawerence street
Answered by Penny Nom. |
|
|
