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The dimensions of a rectangle |
2008-03-06 |
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From Julie:
Find the dimensions of a rectangle with an area of 400. Width x ft.
Length (2x-7)ft.
Answered by Stephen La Rocque and Penny Nom. |
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Base 5 arithmetic |
2008-03-06 |
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From Jana:
Hello, my name is Jana, i have asked a question here previously about how to count in base-5. I am happy now because i can convert any number now and it is very easy for me. The only thing i am having trouble with is understanding how to do a maths sum or times base-5 numbers. it is just a bit hard for me. So do you think you could explain how to do a sum in base-5 and how to do a multiplication sum. Please help...Thankyou Jana!!
Answered by Harley Weston. |
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Two points moving on a straight line |
2008-03-06 |
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From laura:
Particle A travels at constant speed of 1.0ms-1 in straight line, passing particle B, at which time particle B beings traveling with constant acceleration of 0.2ms-2 until reaching Particle A.
What equations represent the displacement of particle A and particle B measure from the point they first pass?
How long does it take for particle B to catch up with particle A?
What is the speed of particle B when reaching particle A?
What distance have both particles traveled from where they first pass to where they meet again?
Calculate the displacement of both particle A and B at 2 second intervals between t=0s and t=12s?
Answered by Stephen La Rocque and Penny Nom. |
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A dog and a fire hydrant |
2008-03-06 |
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From Brittany:
A bulldog is walking east along Main St. at a speed of 4 miles per hour. He wants to get to a fire hydrant on a parallel street. Initially, the bearing to the hydrant is south 62 degrees east. After 20 minutes, the bearing is south 41 degrees east. If the bulldog continues his walk, what is the closest he will be to the hydrant?
Answered by Stephen La Rocque. |
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Polar coordinates |
2008-03-05 |
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From kumi:
2.Sketch the graph of r=(2)/(1-sinθ). Make sure you show a complete chart demonstrating how you arrive at your sketch, and sketch the graph neatly and clearly with proper labeling.
b. change the equation above to cartesian coordinates and identify the type of graph.
c.explain which coordinate system gives an easier function to graph and why
d.find a function of the form r=f(θ) for a circle centered at (8,π/2) and with the point (0,0) lying on the circle
Answered by Penny Nom. |
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Some three-digit numbers |
2008-03-05 |
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From Toni:
The following is a word pattern problem listed on my son's homework:
write a set of three-digit numbers that contain one odd number and three even numbers.
This confused the both of us because that would make his number a four digit number, right?
please respond. Thanks.
Answered by Penny Nom. |
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Parametric equations |
2008-03-05 |
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From kumi:
I have made a picture of a football pass 45 degrees with 30yds and height of 7ft and 4ft. But I am just stuck there. I have stared at the worksheet for soo long. I have no idea how to solve this, and I don't even know where this is going (I don't understand how parametric equations work). Can you help me with this problem?
1.The quarterback of a football team releases a pass at a height, h, of 7ft above the playing field, and the football is caught by a reciever at a height of 4ft, 30yds directly downfield. The pass is released at an angle of 45 degrees with the horizontal with an initial velocity of vo. The parametric equations for the position of the football at time t are given, in general, by x(t)=(vo cosθ)t and y=h+(vo sinθ)t-16t^2.
a. find the initial velocity of the football when it is released
b. write the specific set of parametric equations for the path of the football
c.use a graphing calculator to graph the path of the football and approximate its maximum height
d. find the time the reciever has to position himself after the quarterback releases the football
Answered by Harley Weston. |
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An arithmetic expression |
2008-03-05 |
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From Kasani:
evaluate the expression: -2^-1[-14 - 4(-6)] - (7 - 3)
Answered by Penny Nom. |
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How large is a container that will hold 3.5 cu meters? |
2008-03-05 |
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From Robert:
If a company allows you to ship personal belongings while on an over seas assignment and the figure is 3.5 cubic meters. Just how much is the total area in square feet?? 10X10X10 or??? I just wanted to understand the size of a container that would hold 3.5 cubic meters!!
Answered by Harley Weston. |
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One number is four less than five times another number |
2008-03-05 |
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From alice:
One number is four less than, five times another number. The total of the two numbers is 50. What are the two numbers?
Answered by Penny Nom. |
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A roll of paper |
2008-03-05 |
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From Sheik:
How I Convert My Roll Weight Into Meters?
Roll Width : 241mm
Thickness : 56gsm
Weight :81 Kg
Answered by Harley Weston. |
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Is every rectangle a square? |
2008-03-04 |
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From Odette:
if every square is a rectangle, is every rectangle aslo a square?
Answered by Penny Nom. |
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Adding feet and inches |
2008-03-04 |
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From mike:
3.25'+3.25"
Answered by Penny Nom. |
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I need to level a 18ft x 21ft area that is very uneven. |
2008-03-04 |
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From Shelia:
I need to level a 18ft x 21ft area that is very uneven. I have used a line level to determine the number of inches at various places in the area. This varies from 1 inch to 15 inches in order to bring the garden area up level. How do I calculate cubic yards so I can order topsoil for the area. If needed, I have the number of inches needed for each square yard area.
Answered by Penny Nom. |
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A 6 pointed star |
2008-03-04 |
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From Siddharth:
When 2 congruent equilateral triangles share a common center, their union can be a star
If their overlap is a regular hexagon with an area of 60, what is the area of one of the original equilateral triangles?
a) 60 b) 70 c) 80 d)90 e)100
Answered by Stephen La Rocque. |
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