 |
|
|
|
|
|
|
|
|
What is the square root of 729 to the third power? |
2007-04-25 |
|
From Tori:
What is the square root of 729 to the third power?
Answered by Penny Nom. |
|
|
|
|
|
|
Who am I? |
2007-04-24 |
|
From Lisa:
I am the largest two digit number whose units digit divides its tens digit evenly. Who am I?
Answered by Stephen La Rocque. |
|
|
|
|
|
|
Sand, stone and cement |
2007-04-24 |
|
From Vijai:
I have a room with the following dimensions: length=14 feet, width =20 feet and I'd like to pour a floor 6 inches high. What ratio of sand, stone and cement is needed to cover this area. I would really appreciate your help.
Answered by Penny Nom. |
|
|
|
|
|
|
What is the Sales Tax? and Shipping? |
2007-04-24 |
|
From Mark:
1 Item $4020.44
1 Item $1749.86
1 Item $11455.62
Total 17,225.92
The sales tax and shipping is included in the total. The sales tax rate is 8.75%
What is the Sales Tax? and Shipping?
Answered by Stephen La Rocque. |
|
|
|
|
|
|
0.68 acres |
2007-04-24 |
|
From Tina:
What shape would an 0.68 acre parcel have to be, if you were going to make is as straight as possible?
Answered by Penny Nom. |
|
|
|
|
|
|
Linear programming |
2007-04-24 |
|
From Sylvia:
What is graphing linear programming?
Answered by Penny Nom. |
|
|
|
|
|
|
A triangle problem |
2007-04-23 |
|
From Dimitri:
In the triangle ABC, M is the midpoint of AB and N is the midpoint of AC. Prove that CM and BN cannot bisect.
(I can prove it by contradiction if it is a scalene triangle, but i cant seem to prove it for isosceles)
Answered by Chris Fisher. |
|
|
|
|
|
|
How much water is in the pool |
2007-04-23 |
|
From Kayla:
how much water is in a pool which is 10m x 5m and is 1.5m to 2.5m in depth?
Answered by Penny Nom. |
|
|
|
|
|
|
A growing heap of sand: related rates |
2007-04-23 |
|
From Charles:
Sand falls on to a horizontal ground at the rate of 9m ^ 3 per second and forms a heap in the shape of a right circular cone with vertical angle 60. Show that 10 seconds after the sand begins to fall, the rate at which the radius of the pile is increasing is 3 ^ (1/3) * (4/pi) ^ (1/3) m per minute.
Answered by Stephen La Rocque and Penny Nom. |
|
|
|
|
|
|
Find the percentage of the students that are here? |
2007-04-23 |
|
From C.:
If there are 260 students on roll and 11 of them are absent, how do i find the percentage of the students that are here?
Answered by Stephen La Rocque. |
|
|
|
|
|
|
How can I find out how many sides there are? |
2007-04-23 |
|
From gn:
I know the angle measurements of a convex polygon. They are congruent angles. How can I find out how many sides there are?
Answered by Steve La Rocque, Penny Nom and Walter Whiteley. |
|
|
|
|
|
|
The size of a freezer |
2007-04-23 |
|
From Jacqui:
How many can packages can fit? I have a freezer that is 7cf. But
it contains a little tray component. The freezer measurements without the
tray is(bear with me, I'm not good with LxWxD) 23 across x 16 W x 25
deep (I'm assuming depth) and the tray is 8 across x 16 w x 15 D. We are
trying to see how many 9 L x 6 W x 3.5 D packages can fit in the freezer.
Please help me. I'm getting app. 60. I need 84 to be able to fit.
Answered by Penny Nom. |
|
|
|
|
|
|
Physics/Temperature Change |
2007-04-22 |
|
From William:
A 3.00 x 10^-3 kg lead bullet travels at a speed of 2.40 x 10^2 m/s and hits a wooden post. If half the heat energy generated remains with the bullet, what is the increase in temperature of the embedded bullet? (specific heat of lead = 1.28 x 10^2 J/kg)
Answered by Stephen La Rocque. |
|
|
|
|
|
|
A bag of mulch |
2007-04-22 |
|
From John:
I have a bag of mulch that contains two cubic feet of mulch. If I speard it out at a height of one inch, in a three foot wide flower bed - how feet can I cover?
Answered by Stephen La Rocque. |
|
|
|
|
|
|
What is the speed of the boat? |
2007-04-22 |
|
From Sonja:
A boat on a river travels downstream between two points, 20 miles apart, in one hour. The return trip against the current takes 2 1/2 hours. What is the speed of the boat? The answer in the book says 14 mi/hr, but I don't understand how to figure it out. It must be very simple, but I'm stuck. Thank you so much for helping me out. This is a FANTASTIC website! -Sonja
Answered by Penny Nom. |
|
|
