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A conical funnel |
2008-11-12 |
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From Rachael:
Hello, I am a 10th grader in AP Calc, and can not figure out this question:
Water is running out of a conical funnel at the rate of 1 inch^3/sec. If the radius of the base of the funnel is 4 in. and the altitude is 8 in., find the rate at which the water level is dropping when it is 2 in. from the top.
Answered by Harley Weston. |
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Three digit combinations |
2008-11-12 |
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From Jimmy:
How many 3 digit combinations are possible using numbers 1-9?
How did you get that answer?
Answered by Harley Weston. |
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Equations with fractional powers and roots |
2008-11-12 |
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From David:
Find all real solution to each equation.
x^-2/3 = 9 how do you do this if its to the power
x + 1= Square root (3x +13) can you explain how to get an solution with square root?
Answered by Penny Nom. |
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Mary and Jane on a halfmile track |
2008-11-10 |
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From alan:
mary is walking 15mph on a half mile track. jane is walking 12mph on a halfmile track.
how much time will it take mary to pass jane.? HOW MANY TIMES WILL MARY PASS JANE IN 1 HOUR?
Answered by Chris Fisher and Penny Nom. |
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Math and nursing |
2008-11-10 |
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From alina:
how many math do you net for nurse
Answered by Stephen La Rocque. |
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Supplementary angles |
2008-11-10 |
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From Anna:
<A and <B are supplementary angles. Twice the measure of <B is one-fourth the measure of <A. Find the measure of both angles.
Answered by Penny Nom. |
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Liquid in a drum |
2008-11-10 |
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From RAY:
How can I determine the exact amount of liquid in an overturned drum?
Answered by Penny Nom and Victoria West. |
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Filling a tank with 2 taps |
2008-11-10 |
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From Murray:
2 taps turned on together can fill a tank in 15 minutes. By themselves, one
takes 16 minutes longer than the other to fill the tank.Find the time taken to
fill the tank by each tap on it's own.
Answered by Penny Nom and Victoria West. |
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How fast is the distance between the airplanes decreasing? |
2008-11-10 |
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From Crystal:
At a certain instant, airplane A is flying a level course at 500 mph. At the same time, airplane B is straight above airplane A and flying at the rate of 700 mph. On a course that intercepts A's course at a point C that is 4 miles from B and 2 miles from A. At the instant in question, how fast is the distance between the airplanes decreasing?
Answered by Harley Weston. |
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The reciprocal of a mixed number |
2008-11-08 |
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From Trini:
Can the reciprocal of a mixed number be another mixed number? Explain, and give an example.
Answered by Penny Nom. |
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A flagpole and a yardstick |
2008-11-07 |
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From Wanda:
One boy holds a yardstick vertically at a point 40 feet from the base of the flagpole. The other boy backs away from the pole to a point where he sights the top of the pole over the top of the yardstick. If his position is 1 ft 9 in from the yardstick and his eye level is 2 ft above the ground, find the height of the flagpole.
Answered by Penny Nom. |
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A repeating decimal |
2008-11-07 |
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From mike:
what is 0.0028282828 recurring as a fraction?
Answered by Penny Nom. |
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Algebraic equations with fractions |
2008-11-07 |
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From John:
Solve each equation. Check each solution.
1/8+5x/x+2=5/2
10/2y+8 - 7y+8/y(squared)-16 = -8/2y-8
Answered by Harley Weston. |
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Solve the equation 2x + y = 6 for y. |
2008-11-07 |
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From fatiuma:
Solve the equation 2x + y = 6 for y.
Answered by Penny Nom. |
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The dimensions of a rectangle |
2008-11-07 |
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From laela:
A rectangle is 8 feet long and 6 feet wide.If the dimension is increased by the same number of feet,the area of the new rectangle formed is 32 square feet more than the area of the original rectangle.By how many feet was the each dimension increased?
Answered by Penny Nom. |
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