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Largest cone in a sphere |
2015-01-15 |
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From Alfredo:
What is the altitude of the largest circular cone that may be cut out from a sphere of radius 6 cm?
Answered by Penny Nom. |
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Percentage change |
2015-01-14 |
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From Jim:
When using a scale e.g. 0-10, what is the formula for calculating percentage change. For example when someone answers a questionnaire where a question has a 0-10 scale, and they score a 4 first time, and then they answer the same questionnaire a different day, and they score an 8, how do I calculate the percentage change.
Answered by Penny Nom. |
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A sequence |
2015-01-13 |
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From cyaz:
write a rule for each sequence then find next 3 terms for 7/8, 3 1/8, 5 3/8
Answered by Penny Nom. |
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An input/output table |
2015-01-13 |
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From Rose:
How do you create an input/output table when the rule is: the output is a +5?
Answered by Harley Weston. |
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$xx,xxx million |
2015-01-12 |
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From sherry:
as a financial editor, for years I've seen $\$$ amts like this:
$\$xx,xxx$ million (ie, with a comma, not dec point)
Isn't that thousands of millions, which would equal 'billions'?
Answered by Penny Nom. |
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An investment for 20 months |
2015-01-12 |
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From rose:
Darnell wants to have 2700$ to purchase a tv in 20 months. what will he need to deposit today if he earns 5% annual interest compounded monthly
Answered by Penny Nom. |
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h+h+h = -9 |
2015-01-12 |
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From juanita:
How to solve h+h+h = -9
Answered by Penny Nom. |
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The length of a roll of paper |
2015-01-12 |
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From Peggy:
roll of paper 3ft wide and roll equals 500 sq ft how long would the roll be?
Answered by Penny Nom. |
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A difference quotient |
2015-01-12 |
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From Sasha:
Simplify the difference quotient
f(x) − f(a)/ x-a
if x ≠ a.
f(x) = x^3 − 12
Answered by Penny Nom. |
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The volume of a lake |
2015-01-10 |
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From Peter:
If a lake is 8 acres in size and 10 feet deep how many gallons of water does it contain
Answered by Penny Nom. |
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Mutually prime composite numbers |
2015-01-09 |
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From nivedita:
Two composite number that is mutually prime?
Answered by Penny Nom. |
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Selling items at a reduced price |
2015-01-09 |
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From Kent:
I have an item I sell for $19.95 and make a profit of $10.97 for each sale.
If I reduce the price to $14.97, my profit is $5.99 each sale.
Is there a formula to determine how many more I would need to sell
at $5.99 per sale to make the same net cash (profit) as selling at $10.97 per sale?
Answered by Penny Nom. |
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The units digit of a prime |
2015-01-08 |
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From Patricia:
Every prime number greater than 10 has a digit in the ones place that is included in which set of numbers below 1 3 7 9 or 1 3 7 or 0 2 4 5 6 8 or 1 3 5 9
Answered by Walter Whiteley. |
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Missing digits in a phone number |
2015-01-07 |
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From Janelle:
I had a friend try and play a game on me, regarding phone numbers, so I only know the area code , and the last four digits of the phone number. Which means, there are 3 digits that I need to figure out all the possibilities to.
Answered by Penny Nom. |
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Scheduling 12 for lunch |
2015-01-05 |
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From Sabrina:
I have 12 staff members that need to have lunch together 1 time each week. I am trying to pair them in a way that we each have the same amount of lunches in the same amount of weeks. Please Help! Thanks!
Answered by Victoria West. |
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