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log2x+log(x+4)=1 |
2008-04-12 |
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From ryan: solve the equation for x, log2x+log(x+4)=1 Answered by Penny Nom. |
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The capacity of a silo |
2008-04-12 |
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From Candonn: I have a cement silo that is 30 ft. high and has a diameter of 12 ft.
I was wondering what the capacity of the silo is in tons of dry material.
The silo is flat on the bottom also. Answered by Penny Nom. |
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Jill and Matt run on a 400 meter long oval track |
2008-04-11 |
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From jamie: Jill and Matt run on a 400 meter long oval track. Jill and Matt each run 10 laps daily and both run in the same lane.
One day Jill and Matt began at the same point, but ran around the track in opposite directions. Jill ran at a constant speed that was 2 meters per second faster than matts constant speed. Jill passed Matt for the first time in 40 seconds. Jill ran at a constant rate of how many meters per second? Answered by Penny Nom. |
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The slope intercept form |
2008-04-11 |
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From Dave: Hi, why is there a y-intercept in the slope intercept form?What does the y-intecept have to do with the equation? Answered by Penny Nom. |
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Two trains left the city at the same time |
2008-04-11 |
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From J: Two trains left the city at the same time, traveling in opposite directions. The eastbound train travels for ten hours and the westbound train travels for 5 hours. They are now 1300 km apart. The westbound train's rate is 20 km/hr faster than the eastbound train. Find the speed of each train. Answered by Penny Nom. |
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A truncated cone |
2008-04-11 |
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From jason: i need to know how to figure the cubic feet of a cone that the top is 72" wide the bottom is 25" wide and it is 48" tall.
is there a specific formula for this? Answered by Penny Nom. |
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Some 4 sided polygons |
2008-04-11 |
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From kathy: I am a 4th grade student and need to complete this question:
I need to draw 2 polygons with 4 sides and 2 right angles. Please help. Thanks Answered by Penny Nom. |
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Two function problems |
2008-04-10 |
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From keith: find the domain: F(x)= 1/ {ln (x+5) - ln (7-x)}
find the inverse: g(t)= sqrt {2-3 ln (1-t)} Answered by Penny Nom. |
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A rectangle word problem |
2008-04-10 |
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From Nick: A rectangle is twice as long as it is wide. If the length and width are both increased by 5cm, the resulting rectangle has an area of 50cm^2. Find the dimensions of the original. Answered by Penny Nom. |
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The volume of a triangular shaped pond |
2008-04-10 |
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From Bret: we have a pond that is triangular shape : 130ftx130ftx150ft and is 4ft deep. How can I figure out as to how many gallons of water it will take to fill it up? Thanks for your help :) Answered by Penny Nom. |
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A car is travelling at 80 km/hr speed |
2008-04-10 |
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From mathew: A CAR TRAVELLING AT A SPEED OF 80km/hr. How much time will take this car to cross a tunnel of 100M Answered by Penny Nom. |
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A chain letter |
2008-04-10 |
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From Lesley: In the mail you receive a chain letter with a list of ten names on it. The instructions tell you to send $2 to the person named on the top of the list, cross his name out, and place your name on the bottom. YOu then have to send ten copies of this letter to friends with the same instructions. If no one breaks the chain how much money should you receive? Answered by Stephen La Rocque and Harley Weston. |
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The chain rule |
2008-04-10 |
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From joey: pls help me to Differentiate
y=(3x^2-4x)^8 Answered by Harley Weston. |
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The game of 24 |
2008-04-10 |
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From sherwin: ok is like this you must get 24 using 1,5,5,5 but you can only use +, - , / and * Answered by Claude Tardif. |
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Cutting a 200 diameter pipe at 45 degree angle |
2008-04-10 |
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From Al: i want to cut a 200 diameter pipe in 45degrees. Can you demonstrate how to develop a flat rap around please Answered by Harley Weston. |
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