 |
|
|
|
|
|
|
|
|
A cone is 2/3 full of sand |
2014-12-14 |
|
Janice pose la question :
A cone with a radius of 3.5 cm and a height of 12 cm is 2/3 full of sand.
What is the volume of the sand inside?
Penny Nom lui répond. |
|
|
|
|
|
|
A right triangle |
2014-12-13 |
|
Katie pose la question :
the shorter leg of a right triangle measures 2 feet less than the longer leg. the hypotenuse measure 10 feet. find all three sides
Penny Nom lui répond. |
|
|
|
|
|
|
Planar curves |
2014-12-13 |
|
ann pose la question :
what does planar curve mean in your definition of a cone?
Penny Nom lui répond. |
|
|
|
|
|
|
A cuboid |
2014-12-11 |
|
Nehal pose la question :
Six cubes have a surface area of 24 cm2. They are joined together to male a cuboid.
What could the surface area of this cuboid be? There are two different answers.
Penny Nom lui répond. |
|
|
|
|
|
|
Remainder |
2014-12-08 |
|
Muqadasah pose la question :
A number, when divided by136, leaves remainder 36. If the same number is divided by 17, what will be the remainder?
Penny Nom lui répond. |
|
|
|
|
|
|
30% profit |
2014-12-05 |
|
Lyn pose la question :
I would like to know a formula that I would use on a standard calculator to calculate a 30% profit margin on an item.
If I purchased an item at $7.70 how would I calculate 30% profit for me, not just 30% mark up?
Penny Nom lui répond. |
|
|
|
|
|
|
A circle through 3 points |
2014-12-04 |
|
priyanka pose la question :
Find the equation of a circle passing through the origin and intercept on axes are a and b.
Penny Nom lui répond. |
|
|
|
|
|
|
Shaking hands at a party |
2014-12-03 |
|
Nazrul pose la question :
At a party, everyone shook hands with everybody else. There were 66 handshakes. How many people were at the party?
Please help me.
Penny Nom lui répond. |
|
|
|
|
|
|
How do you change a decimal to a ratio? |
2014-11-29 |
|
Esmeralda pose la question :
How do you change a decimal to a ratio? Express the decimal 0.2 as a ratio.
Penny Nom lui répond. |
|
|
|
|
|
|
1999 equations in 1999 unknowns |
2014-11-28 |
|
Subrahmanya pose la question :
Solve the following system of 1999 equations in 1999 unknowns :
x1+x2+x3=0, x2+x3+x4=0……., x1997+x1998+x1999=0,
x1998+x1999+x1=0, x1999+x1+x2=0.
(in x1,x2,...................,x1999 the numbers 1,2,.............,1999 are subscripts)
Penny Nom lui répond. |
|
|
|
|
|
|
Even and odd |
2014-11-28 |
|
Subrahmanya pose la question :
n1, n2, n3....................,n1997 are integers not necessarily distinct. (actually in n1, n2,.............., n1997 the numbers 1,2,.................,1997 are subscripts of 'n')
X= (-1)^n1+(-1)^n2+............+(-1)^n998
Y=(-1)^n999+(-1)^n1000+............+(-1)^n1997
Then
which of the following options is true
A) (-1)^X = 1, (-1)^Y = 1 B) (-1)^X = 1, (-1)^Y = -1
C) (-1)^X = -1, (-1)^Y = 1 D) (-1)^X = -1, (-1)^Y = -1
E) none of these
Penny Nom lui répond. |
|
|
|
|
|
|
Exponential notation |
2014-11-27 |
|
Jaqui pose la question :
May sound super easy, but how would you SHOW that you simplified
3x3 to the power of 2 (the little 2)?
thank you!
Jaqui
Penny Nom lui répond. |
|
|
|
|
|
|
What is 20 and 3/5 of 10? |
2014-11-26 |
|
Jeannine pose la question :
What is 20 and 3/5 of 10? Question is written exactly this way.
Is this 20 3/5 times 10 (103/5 times 10), or is it 20 and (3/5 times 10)?
Penny Nom lui répond. |
|
|
|
|
|
|
Mark's book case |
2014-11-24 |
|
anne pose la question :
mark has 312 books in his case. he has 11 times as many fiction books as non fiction books. how many fiction books does mark have?
Penny Nom lui répond. |
|
|
|
|
|
|
Cutting a hexagon with a sliding miter saw |
2014-11-23 |
|
Joseph pose la question :
I need the angles in degrees for a hexagon one side is 18inches on the outside the problem I am having is in the angle of the cut and I am using a sliding miter saw which only goes from0 degrees to 45 degrees so I need help in getting the angle of the cut
Harley Weston lui répond. |
|
|
