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Calculating interest |
2007-04-15 |
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From Gerry:
Calculate the amount of interest received on £120.00 desposited in an account paying
3% simple interest for three years.
Answered by Stephen La Rocque. |
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y = cos(2x) and y = -0.5 |
2007-04-15 |
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From kassandra:
Sketch the graphs of y= cos 2x and y= -0.5 over the domain -pi < x
I was wondering if someone could check it for me thanks!
Answered by Penny Nom. |
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The second derivative |
2007-04-14 |
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From Gerry:
In mathematical context,what do you understand by the term "Second Derivative"
Answered by Penny Nom. |
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How do i form a paper cone |
2007-04-14 |
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From Sash:
How do i form a paper cone with the height of 25 cm, the slant height
of 25.8 cm, and the radius of 6.2 cm?
Answered by Stephen La Rocque. |
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The area of a regular hexagon |
2007-04-14 |
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From Chantel:
Could you please explain to me why the formula for a regular hexagon is
3√3/2 multiplied by side²? Thank you very much.
Answered by Stephen La Rocque. |
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The area of a heptagon |
2007-04-14 |
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From Chantel:
Would you be able to tell me the formula to work out the area of a
heptagon? thank you.
Answered by Stephen La Rocque. |
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Radio waves |
2007-04-14 |
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From john:
length of a 2.4 gig. radio wave
Answered by Stephen La Rocque. |
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The area of an irregular pentagon |
2007-04-14 |
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From Steven:
I have been given a coursework in which i have to investigate various shapes to find the one that would give the largest area with 1000m perimeter.
I'm stuck in a part where i have to calculate the area of a irregular pentagon. i don't know where to start from. I can make up the length of all the sides (5 sides), so long they add up to 1000, but i'm not quite sure what to do after that.
Answered by Penny Nom. |
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One number is 12 more than another. |
2007-04-14 |
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From Devon:
One number is 12 more than another. The sum of the smaller number and twice the larger number is 39. Find the larger number.
Answered by Penny Nom. |
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Division of polynomials |
2007-04-14 |
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From Rajendra:
Find the remainder when x3+3x+1 is divided by x+pi
Answered by Penny Nom. |
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A sketch of a quadratic equation |
2007-04-14 |
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From Fee:
A ball is thrown upward from the roof of a 25m building. The ball reaches a height of 45m above the ground after 2s and hits the ground 5s after being thrown.
Use the fact that the realtion between the height of the projectile and time is quadratic to draw an accurate graph of the relation on graph paper.
Answered by Penny Nom. |
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The angle of depression |
2007-04-14 |
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From Mary-Beth:
Two towers are 30 m apart. From the 15th floor, 40 m up, find the angle of depression to the base of the taller tower? I think the answer is 53, but the answer book says 37.
Answered by Penny Nom. |
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Factoring by grouping |
2007-04-13 |
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From vincent:
How would you factor
the number in ( ) are exponents
2b(3)+3a(3)+3ab(2)+2a(2)b =
and
4b4b(3)+a(2)b - 4a - ab(4) =
Answered by Haley Ess. |
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Word problems |
2007-04-13 |
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From Perla:
1.A school district is proposing a 5% increase in the numbber of days in a school year. How long would a school year be with the proposed increase?
2. 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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Graphs of trig functions |
2007-04-13 |
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From taylor:
The following graph represents a sine function in the form
y=A sin B(x+C) +D or a cosine function in the form y=A cos B(x + C) +D. Write an equation of the graph in both forms
Answered by Stephen La Rocque. |
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