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An arc and an angle |
2008-10-05 |
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From Cory:
I have a chord length of 150'. From the left starting point, I know that
30' right of starting point is 9' in height. This would be the top of the arc.
What is the arc in degrees and can anyone display an image to help me
understand?
Answered by Penny Nom. |
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A product of positive and negative numbers |
2008-10-03 |
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From kaylou:
Suppose you were given 13 numbers and asked to find their product.
Seven of the numbers were positive, and the rest were negative.
Would your product be positive or negative? Why?
Answered by Penny Nom. |
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The break even point |
2008-10-03 |
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From dina:
virgin record company has just signed a new artist to its label. They have pais the new group 25000 dollars to record their album
and paid each band member 10000 dollars each. The band is not given
a commission on each cd sold or downloaded, therefore, each cd sold is profit earned by virgin. How
many cd's would they have to sell to break even if this new band has 5 members? Each cd is sold at the price of 20$.
Answered by Penny Nom. |
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A different approach to a word problem |
2008-10-03 |
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From Kenneth:
Sarah's age is 2/3 of Mary's age and 3/4 of Ruth's age. The sum of their ages is 46 years. How old is each?
Answered by Penny Nom. |
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Finding the Distance Between Two Latitudes |
2008-10-02 |
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From Samua:
Assuming that the Earth is a sphere of radius 4000 miles and that the cities
are on the same longitude (one city is due north to the other). Find the distance between
the cities with the latitudes of 37 degrees 47'36'' and another city with 47 degrees 37'18''. Heeeeeeeeeeelp!
Answered by Janice Cotcher. |
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Finding the Raw Score for a Mean of 0 and Standard Deviation of 1 |
2008-10-02 |
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From Anita:
A variable Y has a distribution of mean of Y =80 and standard deviation of Y=36. Find the values of A and B for transforming y*=A +BY so that mean of y* =0 and standard deviation of y*=1.
Answered by Janice Cotcher. |
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The unusable space in a container |
2008-10-02 |
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From Billy:
an object is 42 inches long, 29 inches wide, and 69 inches high. The usable capacity of this container is 36.4 cubic feet. How much space in percentage is left over from the container?
Answered by Penny Nom. |
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Compatible numbers |
2008-10-02 |
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From jeff:
what exactly are compatible numbers,
math problem is:
Estimate the total weight of 2 boxes that weigh 9.4 pounds and 62,6 pounds
using rounding and compatible numbers. Which estimate is closer to the actual weight and why?
Answered by Harley Weston. |
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4^x = 2^x + 12 solve for x |
2008-10-02 |
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From Dave:
4^x = 2^x + 12 solve for x.
Answered by Harley Weston. |
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Find an All Odd 4 - Digit Number |
2008-10-02 |
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From Denise:
a number has 4 different odd digits. the difference between the greatest digit and the least digit is 6, the number is greater than 2,000 and less than 3,160. what is the number?
Answered by Janice Cotcher. |
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Does an oval have sides? |
2008-10-02 |
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From reid:
My 6 yo neice came home with her math homework and she was supposed to identify which objects had sides.One of the objects was an oval.I don't believe it has sides because it is curved and I don't think that would make it an object with sides.What would be the correct answer?Thanks,Reid
Answered by Janice Cotcher. |
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The length of a tank |
2008-10-01 |
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From alex:
I have a tank which I can only partly see. It is 70cms wide, 45 cm deep and hold 500litres. How long is it?
Answered by Harley Weston. |
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Conversion to cubic feet |
2008-10-01 |
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From Dorothy:
What is the cubic feet of an item that is 7"x16 7/8"x19"
Answered by Harley Weston. |
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Cost before and after the GST |
2008-10-01 |
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From bruce:
Hi, i seem confused on this topic:
If i need to add say 10% GST to a cost then i would times it by 1.1.
If i need to reduce the cost by 10% then i need to divide it by 1.1. that is all well and good.
What if i need to add 12%, 18% or 20% what is the formula then?
Answered by Penny Nom. |
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Working together but one person starts first |
2008-09-30 |
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From David:
Della can scrape the barnacles from a 70 ft. yacht in 10 hours using an electric barnacle scraper. Don can do the same job in 15 hours using a manual scraper. If Della started helping Don three hours after Don started scraping, how long will it take to scrape the entire boat?
Answered by Penny Nom. |
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