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Compound interest |
2013-05-10 |
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From Kyla:
I am doing correspondents and cannot figure out how to explain the solution to this question, I do not understand how they came to this answer and need it explained step by step so I can complete the following questions in this unit, please help!!!
Calculating compound Interest
Johnny invest $800 that pays 8% compounded quarterly for 5 years. How much is the investment worth at the end of the 5th year?
Answered by Penny Nom. |
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Water use in a rectangular flush tank |
2013-05-10 |
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From milo:
A rectangular flush tank 22" by 71/4 contains water to depth of 17" how many gallons of water will be saved if a conservation device reduces the capacity to 3/5 of this amount? And reduced to the nearest tenth
Answered by Penny Nom. |
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20 golfers over 5 days |
2013-05-09 |
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From Russ:
we have 20 golfers over 5 days, with 4 people per foursome which makes 5 groups each day. I would like to each person to play with everyone at least once if possible. Do you have a formula for this?
Answered by Victoria West. |
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siin (A) and sin (A/2) |
2013-05-09 |
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From shanaia:
given that sin A=4/5 and A is obtuse.find sin (A/2)
Answered by Penny Nom. |
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A triangle and an incircle |
2013-05-09 |
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From Max:
On my Geometry Test about tangent, chord, and secant lengths, my teacher gave an extremely difficult problem.
It was a Circle inscribed in a Triangle with all triangle sides being tangents and lengths were given. My class was told to find the length of each segment of the line.
The points on each line were the vertexes of the triangle, and the point where the line hits the circle.
Please explain how someone could do this.
Answered by Chris Fisher. |
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The surface of a solid |
2013-05-07 |
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From mustafa:
I am doing a research paper on solid surface applications . Part of the project is to find four at least in our world today and explain what there purpose is. I really need help in this area because I've been searching the internet for where solid surface are used in our world today and I really can't find anything.. Thanking you in advance, mustafa
Answered by Penny Nom. |
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Drawing a pentagon |
2013-05-06 |
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From jacob:
hello. i am trying to draw a template for a project. but i don't have a
protractor. i'm trying to draw a normal pentagon with 2cm sides. what
i'm trying to figure out is the distance in centimeters from point a, to c,
in a straight line. this is needed so that i can measure and create the
shape without a protractor, and keep the angles and sides correct.
if you can help me with the measurement, or help me another way,
any help would be greatly appreciated. thank you.
Answered by Penny Nom. |
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Profit margin |
2013-05-06 |
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From Arron:
I have the retail price of $45.50. This price reflects a gross profit margin of 47%. How do I calculate the original cost of the item?
Answered by Penny Nom. |
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A silver figurine |
2013-05-03 |
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From Renee:
I have a silver figurine, the density of silver is 10.5g/cm3. if the figurine weighed 149 g. to determine the volume, he dropped it into a cylindrical glas of water. the diameter of the glass is 6 cm and the figurine was pure silver, by how much should the water level in the glass rise?
Answered by Penny Nom. |
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A word problem |
2013-05-03 |
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From Shaneaya:
Keikio spent the day bird watching and counted 34 more birds in the morning than in the afternoon. If she counted a total of 76 birds, how many birds did she count in the afternoon?
Answered by Penny Nom. |
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How can we draw the equation "x+y=1" in 3d? |
2013-05-03 |
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From shimaa:
how can we draw the equation "x+y=1" in 3d
Answered by Robert Dawson. |
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Points of intersection |
2013-05-02 |
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From Bianca:
Find the sets of values of k for which the line y=kx-4 intersects the curve y=x^2-2x at two distinct points.
Answered by Penny Nom. |
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Find the height of the tower |
2013-04-28 |
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From nombulelo:
the shadow of a tower,when the angle of elevation of the sun is 30 degrees is found to be 40 meters longer than when it is 45 degrees. Find the height of the tower
Answered by Penny Nom. |
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The rings of a bull's eye |
2013-04-28 |
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From Math:
The bull’s eye of a target is a circle 20 cm in diameter. It is surrounded by four rings, each 15 cm wide. Find the area of each ring.
Answered by Penny Nom. |
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What is the original price? |
2013-04-25 |
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From Dylan:
shirts on sale for 25% off, the sale price is 12.75. What is the original price?
Answered by Penny Nom. |
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