 |
|
|
|
|
|
|
|
|
Units digit |
2008-01-11 |
|
Robin pose la question :
hello - my question is:
what is the units digit of (13) to 4; (17) to 2 and (29) to 3
[(13)4(17)2(29)3]
(possible answers: 9 or 7 or 5 or 3 or 1)
Penny Nom lui répond. |
|
|
|
|
|
|
A circle of diameter 12 cm |
2008-01-11 |
|
Marcy pose la question :
The diameter of the circle is 12cm. I need to convert the diameter to m2.
Penny Nom lui répond. |
|
|
|
|
|
|
Linear systems |
2008-01-10 |
|
Sandra pose la question :
I have two questions. Please solve both. Thank you.
1.) In your chemistry class, you have a bottle of 5% boric acid solution and a bottle of 2% boric acid solution. You need 60 milliliters of a 3% boric acid for an experiment. How much of each solution do you need to mix them together?
2.) You plant a 14-inch hemlock tree in your backyard that grows at a rate of 4 inches per year and an 8 inch blue spruce that grows at a rate of 6 inches per year. In how many years after you plant the trees will the trees be the same height? How tall will each tree be?
Thank you. I did not understand neither problem, so I could not show any work. Please help.
Stephen La Rocque and Harley Weston lui répond. |
|
|
|
|
|
|
cosX= -1.25 |
2008-01-10 |
|
Stephanie pose la question :
Why isn't there really a solution for the equation: cosX= -1.25 ?
Stephen La Rocque lui répond. |
|
|
|
|
|
|
Average Yearly Percentage Change |
2008-01-10 |
|
Ray pose la question :
It's about average test scores over a three year span. If the scores were:
2005- 52.6%
2006- 42.5%
2007- 45.5%
What is the average amount they changed each year in three years?
Stephen La Rocque and Harley Weston lui répond. |
|
|
|
|
|
|
Hoisting an anchor |
2008-01-10 |
|
ron pose la question :
four men on a boat are using a capstan for hoisting an anchor weighing 2000lbs. The diameter of the barrel of the capstan at the section in use is 8in., and the pull on the chain carrying the anchor and passing around the capstan barrel is assumed to act at a distance of 1in. from the surface of the barrel. If the distance from the axis of the barrel to each point at which effort is applied to a capstan bar is 40in., what force must be applied by each man hoisting the anchor?
Stephen La Rocque lui répond. |
|
|
|
|
|
|
Arithmétique modulaire |
2008-01-10 |
|
hausknecht pose la question :
ma grand mère a entre 60 et 80 ans.il y a un an son âge était un multiple de 3.dans deux ans son âge sera un multiple de 2,de 3 et de 9.cette année , c'est un multiple de 5.quel est l'âge de ma grand mère?
Claude Tardif lui répond. |
|
|
|
|
|
|
Forces on an inclined plane |
2008-01-10 |
|
Ron pose la question :
A body that weighs 540lbs is caused to slide up an inclined plane with a uniform velocity by a force that acts parallel to the plane. For each foot of horizontal distance, there is a vertical rise of 2in. If the coefficient of sliding friction is 0.16, what force is required to move the body?
Stephen La Rocque lui répond. |
|
|
|
|
|
|
Base salary plus commission |
2008-01-10 |
|
mike pose la question :
i need some help with this word problem.
in november 2001, hall kinion advertised an account executive position in savannah
georgia for a salesperson with experience selling internet services. the job
advertised a 3500 dollar base salary and 24000 dollar to 48000 dollar in
commissions in the first year. Assuming a 20 percent commission rate, how many
dollars in sales would u have to generate to earn 64000 dollars annually.
Penny Nom lui répond. |
|
|
|
|
|
|
Seven circles in a circle |
2008-01-10 |
|
fae pose la question :
what is the area of the remaining portion of a large circle with radius 12cm and the seven smaller and equal circles just fit inside?
Penny Nom lui répond. |
|
|
|
|
|
|
Sqrt(x^2 + y^2) |
2008-01-10 |
|
Darcie pose la question :
Can you simplify this problem?: square root of (x squared plus y squared).
Note: x squared plus y squared is under the radical.
Penny Nom lui répond. |
|
|
|
|
|
|
A plywood sheet in a doorway |
2008-01-10 |
|
albetel pose la question :
adoor is 7 feet tall and 36 inches wide. what is the widest sheet of plywood that can fit through the door?
Penny Nom lui répond. |
|
|
|
|
|
|
2(x - 5) + 45 = 4 - (3 - 2x) |
2008-01-09 |
|
Kieran pose la question :
Solve
2(x-5)+45=4-(3-2x)
Penny Nom lui répond. |
|
|
|
|
|
|
How do I write the following in exponential form? |
2008-01-09 |
|
Mandy pose la question :
How do I write the following in exponential form?
( square root of a^-2 b)^5
Penny Nom lui répond. |
|
|
|
|
|
|
0.18 of an acre |
2008-01-09 |
|
susan pose la question :
what is the square footage of .18 of an acre of land?
Penny Nom lui répond. |
|
|
