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Graphing cube roots |
2000-04-27 |
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From Heather Jones:
What do the graphs of cube roots look like?
Answered by Walter Whiteley. |
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Searching for socks |
2000-04-26 |
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From Luther Jackson:
There are 10 red socks and 10 blue socks in a drawer. Aside from their color the are identical. All of the socks in the drawer are mixed up. If the room was pitch black, How many socks would you need to pull out of the drawer to be certain that you have a pair that matches? Why?
Answered by Penny Nom. |
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Paying with silver |
2000-04-26 |
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From Luther Jackson:
A silver prospector is unable to pay his March rent in advance. He owned a bar of pure silver, 31 inches long, so he made the following arrangement with his landlady. He would cut the bar, he said into smaller pieces. On the first day of March he would give her and inch of the bar, and on each succeeding day he would add another inch to her amount of silver. She would keep this silver as security. At the end of the month, when the prospector expected to be able to pay his rent in full, she would return the pieces to him.
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Answered by Claude Tardif and Penny Nom. |
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The weight of a watermelon |
2000-04-25 |
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From Lori Speir:
If I have a 100 pound watermelon and it is 99% water. If it sits out in the sun all day and is now only 98% water what does it weigh now?
Answered by Penny Nom. |
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An expected value |
2000-04-24 |
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From Carl Pride:
Suppose that in a statistics class of size 23, each student has a probability of passing of 73 percent. sample: What is the expected number of students who will pass??
Answered by Harley Weston. |
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Conversions |
2000-04-23 |
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From Tara:
750 lbs = ___ tons How do I figure this out!? I know that 1 ton is 2000 lbs, how do I figure out this answer?
Answered by Penny Nom. |
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Adding fractions |
2000-04-23 |
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From A grade 6 student:
In adding fractions, how do I rewrite the fractions so that the denominators are equal? The problem is 3/4 + 1/6 =
The other problem is 11/18 + 4/9 =
Answered by Penny Nom. |
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A colony of bacteria |
2000-04-22 |
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From Nicci Demmin:
Suppose that the bacteria in a colony can grow unchecked, by the law of exponential change. The colony starts with one bacterium and doubles every half hour. How many bacteria will the colony contain at the end of 50 hours?
Answered by Penny Nom. |
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Side length of an octagon |
2000-04-22 |
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From Unknown:
If I have an octagon that is 12 feet across (side to opposite side) how can I find the length of the sides?
Answered by Harley Weston. |
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Two gross minus two score |
2000-04-20 |
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From Georgie:
What is two gross minus two score?
Answered by Chris Fisher. |
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Circumference = Area |
2000-04-19 |
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From Scot George:
The area and circumference of a circle has the same measurement. Find the radius.
Answered by Chris Fisher. |
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Chisanbop |
2000-04-19 |
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From Steven D. Edmonds:
I once heard about a manual counting method which when learned at an early age allowed one to be able to perform large calculations manually. I believe that name of the method (phonetically) was "chisenbok".
Answered by Harley Weston. |
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Question regarding Combinations and permutations |
2000-04-19 |
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From Paul Stoner :
I am a programmer and I have a quick question. I have 5 criteria which will either be true or false. If a criterion is true it returns its ordinal representation, if false it returns 0. I then combine these results to determine where to go in my program. My question is: How can I figure out the number of combinations I will need?
Answered by Patrick Maidorn. |
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Math in various careers |
2000-04-18 |
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From Jennifer Jones:
I am a Fifth grade student researching how math is used in various careers. What kind of math is used in your career? How do you use math?
Answered by Harley Weston. |
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Borrowing |
2000-04-17 |
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From A college student:
How would you explain borrowing to an elementary school student?
Answered by Penny Nom. |
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