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	The volume of a slice from a wedge		2008-10-16
		From Jeff: If I have a wedge shaped object (ie, a triangle of non-specific type extruded along a length) and it is sliced from the two-corner base at one end to the one-point tip at the other, what is the volume of the upper (smaller) part as a percentage of the whole? I hope I have explained it clearly enough. Thanks. Answered by Harley Weston.
	The rate of change of the volume of a cone		2008-10-15
		From Barbara: Suppose that both the radius r and height h of a circular cone change at a rate of 2 cm/s. How fast is the volume of the cone increasing when r = 10 and h = 20? Answered by Harley Weston.
	Percentage of an hour		2008-10-15
		From JESSICA: HI I AM IN GRADE 7 AND FOR MATH HOMEWORK MY TEACHER ASKED US TO MAKE 8 DIFFERENT TIMES(clocks) AND TELL HIM WHAT THE PERCENTAGE FOR THE TIME IS. BUT I DON'T KNOW HOW TO CONVERT TIME TO A PERCENT. PLEASE HELP ME??!!?? JESSICA SEVENTH GRADE Answered by Penny Nom.
	Concavity and the second derivative		2008-10-15
		From Christina: I'm having trouble solving for a second derivative for the following graphing question. f(x) = (X^2+2x+4)/2x using the quotient rule, I found: f'(x) = (x^2-4)/(2x^2) however, using the quotient rule again I can't seem to solve it (concavity): f'''(x)=[(2x)(2x^2)-(x^2-4)(4x)]/[(2x^2)^2] f''(x)=[(4x^3-(4x^3 -16x)]/4x^4 f''(x)=16x/4x^4 f''(x)=4/x^3 and making the equation equal to zero result in 0=4 which doesn't seem to make sense... Answered by Penny Nom.
	Millimeters to inches		2008-10-15
		From diane: can you convert milliliters to inches? Answered by Penny Nom.
	The sides of an octagon		2008-10-12
		From side lengthsGarry: I need the length of the sides and the degrees of the angles for a 30 inch diameter octagon Answered by Janice Cotcher.
	A normal to a curve		2008-10-11
		From sundar: How do I find a normal to a curve defined by equation y = a*x^3+b*x^2+c*x+d Answered by Penny Nom.
	Bags of pennies		2008-10-11
		From paul: jenny divided 15 pennies among 4 money bags.she could then pay any amount from 1p to 15p just by giving bags.how many pennies did jenny put in each bag? Answered by Penny Nom and Victoria West.
	The volume of fluid in a semi circular trough		2008-10-10
		From Kerry: How do I find the volume of fluid in a semi circular trough? Answered by Penny Nom.
	A 10% increase in supply		2008-10-10
		From Irena: How do you find begining inventory if after 10% increase in supply you got 27.5 units Answered by Penny Nom.
	A cone shaped pile		2008-10-10
		From Nadine: I have a pile of wheat in the shape of a cone. I would like to know how much wheat I have. I have found the equation "V=1/3 pie r squared h" , but it dosn't work! The pile is 7 feet high, diameter is 50 feet, circumference is 185 feet. I also measured the slope 19feet. (Probably not needed) You need to know that wheat weighs 60 pounds per bushel, and I would like to know how many bushels I have. Even if I could receive the # of Volume Bushels, I could convert that. Can you help me?? Answered by Stephen La Rocque.
	Nets of Square-Based Pyramids		2008-10-10
		From Miss: How many different nets does a square-based pyramid have? Answered by Janice Cotcher.
	Linear and Angular Velocity		2008-10-10
		From Matthew: The pedal and gear relationship of a bicycle is shown. The radii of the gears are r(sub1) = 5 cm and r(sub2)= 12 cm. The radius of the wheel is r(sub3) = 30 cm. How many rotations per minute of the pedal gear will produce a racing cyclist's speed of 60 km per hr. For a diagram: http://bikepedalsgears.weebly.com/ Answered by Stephen La Rocque.
	Two inequalities		2008-10-08
		From s: 3y > 4x 2x-3y>-6 Answered by Stephen La Rocque.
	Concrete around a pipe		2008-10-08
		From mick: i am trying to find the area of concrete to be placed around a concrete pipe! Dimensions can be 12m wide by 5m wide by 7m deep and pipe been 8m by 600mm radius... Answered by Stephen La Rocque.

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