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The law of sines |
2007-06-09 |
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From Felicia:
A parallelogram has one side that is 12.0 cm and one angle that is 65°. The shorter diagonal is 25.0 cm. To the nearest tenth of a centimetre, how long is the other side of the parallelogram? Use the sine law.
Answered by Penny Nom. |
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What is the total weight of the fish? |
2007-06-08 |
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From Mike:
The tail of a fish weighs 9 oz. The head weighs as much as the tail and half of the body. The body weighs as much as the head and tail combined. What is the total weight of the fish?
Answered by Stephen La Rocque. |
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A pipe full of water |
2007-06-07 |
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From paul:
What is the volume of water in a 100mm inside diameter pipe that is 12.5 meters long
What would be the pressure at the bottom if the pipe was installed in the vertical plain
Answered by Steve La Rocque, Penny Nom and Gabriel Potter. |
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Percent change over multiple periods of time |
2007-06-07 |
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From Eric:
I am trying to show the percent change over multiple periods of time.
Is there a formula for the percent change over multiple periods or will I have to calculate the percent change for each previous period versus the year prior?
Answered by Penny Nom. |
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Percentage below the monthly quota |
2007-06-07 |
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From Greg:
Sales quantities for the month were 12,834 with a monthly quota of 14,796. What is the percentage below the monthly quota?
Answered by Penny Nom. |
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Two tangent lines to y=x^3 |
2007-06-07 |
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From stephanie:
find the equations of two tangent lines to the y=x^3 function through the point (2,8)
Answered by Penny Nom. |
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cos^3x+sin^3x=1 |
2007-06-07 |
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From sannier:
bonjour je bloque sur l'equation: cos^3x+sin^3x=1
j'ai essayé toute les formules de trigonometrie je n'y arrive pas.connaissez vous un moyen de resoudre cette equation ou de m'orienter?
Answered by Claude Tardif. |
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The "mode" of a set of numbers |
2007-06-06 |
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From Anthony's mom:
we have a graph: Kindergarten has 1, 1st has 5, 2nd has 4, 3rd has 3
is the mode "1st grade" because there are more children in that grade?
Answered by Stephen La Rocque. |
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Yards of top soil |
2007-06-06 |
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From Cristina:
How many yards of top soil do I need in a area of 2000 square feet with 18" depth.
Answered by Penny Nom. |
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A weighted score |
2007-06-05 |
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From Cindy:
We need to weight numbers differently in terms of a percentage calculation. One number {80 for example} at 65% and another number {100 for example} at 35%. How do we calculate these into one total grade for example.
Answered by Penny Nom. |
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Rate of change of distance between the clock hands |
2007-06-05 |
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From Jonathan:
A certain Clock has a minute hand with a length of 4 inches long and an hour hand with a length of 3 inches long. How fast is the distance between tips of these hands changing at 9:00?
Answered by Stephen La Rocque. |
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The cost of laying cable |
2007-06-05 |
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From Gilligan:
MetroMedia cable is asked to provide service to a customer whose house is located 2 miles from the road along which the cable is buried.
The nearest connection box for the cable is located 5 miles down the road. If the installation cost is 10 dollars per mile along the road and 14 dollars per miles off the road, express the total cost C of installation as a function of the distance x (in miles) from the connection box to the point where the cable installation turns off the road. Give the domain.
Also, compute the cost if x = 1 mile and if x = 3 miles.
In order to use the given values for x, do I need a formula?
If so, what is that formula?
I can take it from there.
Answered by Stephen La Rocque. |
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Solving a quadratic equation using the Quadratic Formula |
2007-06-05 |
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From Stuart:
Solve the following quadratic equation:
3xsquared-5x-4=0
Answered by Stephen La Rocque. |
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The area of equilateral triangle |
2007-06-05 |
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From solomon:
describe the area of equilateral triangle in terms of its side? solve in two ways.
Answered by Stephen La Rocque. |
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Probability tree - two switches failing |
2007-06-05 |
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From Maura:
draw a probability to show the outcomes of two new switches (a) of both switches being faulty (b)both switches are not faulty (c) that one switch is faulty. The failure rate is 1/10.
Answered by Stephen La Rocque. |
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