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	Sales tax		2015-05-05
		Adalyn pose la question : Hello i've been having some trouble with math, The question is asking for a GST and a PST of a 30.00 dollar shirt. I don't know how to find the GST or the PST please help Penny Nom lui répond.
	The surface area of a hemisphere		2015-05-05
		Mandy pose la question : How can I show that the total surface are of any solid hemisphere is 75% of the area of the full sphere? Penny Nom lui répond.
	The number of possible musical notes using an n-key instrument		2015-05-04
		Farihin pose la question : Lets say that i have keys, and each key is for notes of a musical instrument, So i wanted to find out the number of notes i can get for a certain number keys, of course in the form of an equation. Notes can use as many keys, it can use 1, or 2, or 3, or even 100. Notes in real life is not as such, but ignore reality. I tried doing this but i can't seem to find a formula for it. For example, i have 4 keys, say A, B, C, and D. so, for notes that uses one key are 4, which is A, B, C, and D themselves. for notes that uses two keys are 6, AB, AC, AD, BC, BD and CD. for notes that uses three keys are 4, ABC, ABD, ACD and BCD. lastly for notes that uses all four keys is 1, ABCD. So, the total will be 4+6+4+1=15# The nth term for the first equation is n, the second is [(n^2)-n]/2 the third and the fourth, i don't know but the final answer should be like, n + [(n^2)-n]/2 + [3rd] + [4th] Sorry for the long question though... Penny Nom lui répond.
	13 games, 3 possible outcomes		2015-05-01
		Kennedy pose la question : Hello, hope it finds you well. Am not that good with numbers, can you please help me get all the possible outcomes of 13 games, with a home win, draw or an away win as three possible results for each of the 13 games. Thanks in advance Penny Nom lui répond.
	The method of elimination		2015-05-01
		oreanna pose la question : Question from oreanna, a student: How do u solve 2x+9y=3 7x-4y=-25 in elimination Penny Nom lui répond.
	A square and a rectangle		2015-05-01
		nick pose la question : why is the area of a square of a given circumference greater than the area of a rectangle with the same circumference ? Penny Nom lui répond.
	Filling a pool with dirt		2015-05-01
		Mike pose la question : I have a hole which a 24 ft pool in it is 10" deep in the the centre and goes to 1" inch at the edge want to fill it in with dirt how many yards of dirt would I need to fill it in Penny Nom lui répond.
	The volume of a sphere		2015-04-30
		Cassidy pose la question : How do you find the radius of a sphere that has volume 36pI? Penny Nom lui répond.
	A fraction with a negative exponent in the denominator		2015-04-30
		ellen pose la question : 7/ab to the -4 power Penny Nom lui répond.
	The volume of a cube		2015-04-30
		megan pose la question : What's the volume of a cube with a side length of 6? Penny Nom lui répond.
	The surface area of a cut pipe		2015-04-27
		ARUN pose la question : dear Sir, please advise me , how to calculate the surface area of a pipe with diameter of 630 mm and thickness of 67 mm which is cut in a angle of 22.5 degree. please show me how to calculate the surface area of the pipe which cut in an angle. Thanking you. Harley Weston lui répond.
	A five-digit pass code		2015-04-25
		Mary pose la question : Question from Mary: More on your published question: I have the same type of lock, but set up a 5-digit pass code. Is that more or fewer possibilities than a 4-digit code. How many digits would make the lock most secure? I don't believe Werner specified this, but each number can only be used once. Thanks, Mary Penny Nom lui répond.
	A piecewise function		2015-04-25
		uday pose la question : f(x)={x^2+3x+2 / x+2, x(not equal to)=-1 {4, x=-1 how to find domain and how the graph looks like Penny Nom lui répond.
	Locating the center of a circle that forms an arc		2015-04-23
		Ken pose la question : Find the Cartesian coordinates of the center of an arc with the given location of the beginning and end points and radius length. Not the midpoint of the circumference but the actual point that the arc is drawn around. I know their are two answers depending on the direction of the arc. Unless we assume that all arcs are drawn counter clock wise. Thanks Ken Harley Weston lui répond.
	A word problem with fractions		2015-04-23
		Cecilia pose la question : if one third of a pole is red, one quarter is white and 15m is black what is the height of the entire pole Penny Nom lui répond.

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