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The sum of the digits of a two-digit number is 13. |
2007-01-27 |
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From Liz:
The sum of the digits of a two-digit number is 13. If the digits are reversed, the new number is 9 more than the original number. Find the original number.
Answered by Penny Nom. |
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The interest is compounded daily |
2007-01-26 |
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From Kimberey:
If I put $2000 in a savings account with 5.05% APR and the interest is compounded daily, but credited monthly, how much would I have at the end of a year?
Answered by Stephen La Rocque. |
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Can you make a square out of a right triangle by using only one straight line? |
2007-01-26 |
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From Debra:
Can you make a square out of a right triangle by using only one straight line?
Answered by Stephen La Rocque and Penny Nom. |
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Upper Quartiles |
2007-01-26 |
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From Jamie:
I see you have a question about Q3 with even numbers but what about odd numbers? I have a problem with 19 numbers 36,45,49,53,55,56,59,61,62,65,67,70,75,81,82,86,89,94,99. Is there anyway the answer could be 81.5 because every time I do it I get 82 and my teacher tells me that is wrong. So in conclusion how do you do it?
Answered by Penny Nom. |
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Baby weight gain |
2007-01-26 |
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From Reynaldo:
A baby weighed 3.2 kg at birth. She gained 0.17 kg per week. How old was she when she weighed 5.75 kg?
Answered by Penny Nom. |
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Greatest common factor |
2007-01-26 |
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From Alexis:
What is the greatest common factor of 52,and 100?
Answered by Penny Nom. |
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Take $.01 and double it every day for 30 days. |
2007-01-26 |
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From Pat:
Take $.01 and double it every day for 30 days. How many dollars would you have?
Answered by Stephen La Rocque. |
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The altitude of regular n-side pyramid |
2007-01-26 |
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From Wendimu:
The altitude of regular n-side pyramid is half of it's base side.What is the angle between the lateral face and it's base?
Answered by Penny Nom. |
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Grams and mls |
2007-01-26 |
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From Larissa:
Is there a formula to convert grams to mls..?
Answered by Stephen La Rocque. |
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Concrete slab |
2007-01-26 |
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From Cindy:
How much concrete will it take to pour a slab 16ft.By 18ft. 3inches deep
Answered by Penny Nom. |
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The area of a ellipse |
2007-01-25 |
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From Ranjit:
I have a task in which i have to find the area of a ellipse. i find this difficult because i have only been provided with the perimeter, which is 1000m.
Answered by Chris Fisher. |
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A circle inscribed in an octagon |
2007-01-25 |
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From Anna:
If I know that the sides of my octagon are 8 units, how do I determine the radius of an inscribed circle?
Answered by Penny Nom. |
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exposant 0 |
2007-01-25 |
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From Judith:
Je suis stagiaire dans une classe de sixième année et j'aimerais pouvoir expliquer à mes élèves pourquoi tous les nombres exposant 0 donne 1 comme réponse. ( 10 exposant zéro = 1) Merci!
Answered by Claude Tardif. |
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Splitting a 5 acre piece of property |
2007-01-25 |
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From John:
I have a 5 acre piece of property that I wish to split into 5 individual 1 acre parcels. The 5 acre parcel 1s 660 feet in length and 330 feet in width. The first two parcels are 264'x165', but I am asking for help getting the perimeters of the last 3 lots, one of which is a irregular pentagon. All of the one acre parcels must have an area of 43,560 square feet each.
Answered by Penny Nom. |
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A regular pentagonal pyramid |
2007-01-25 |
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From Vickifazio:
a regular pentagonal pyramid has a base perimeter of 1,085 ft. How long is one side of the base?
Answered by Stephen La Rocque. |
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