Here are the newest items added to Quandaries & Queries:
start over

		Page 327/886

	limit sinx/x		2009-01-30
		From Jackie: how to evaluate limit sinx/x as x tends to zero if x is in degrees Answered by Stephen La Rocque and Harley Weston.
	The intersection of two lines		2009-01-30
		From kaylee: how do you find and graph the intersect of these two equations: y=2x-4 (and) 2y=x thanks, kaylee Answered by Stephen La Rocque.
	Missing three digits in a phone number		2009-01-30
		From Elmer: I have part of a phone number. the first 3 digits are 212, the last digit is four, and the three missing digits are all odd, how many numbers will I have to call to get the right number? 212- _ _ _ 4? Answered by Stephen La Rocque and Penny Nom.
	Whitney's average test score was 79		2009-01-30
		From dawn: After 5 tests, Whitney's average test score was 79. After she scored 85 on the 6th test. What was her new average? Answered by Penny Nom.
	The amount of concrete in a football stand		2009-01-30
		From jacques: A football stand 150 yd long has 20 tiers of seats; each tier has a rise of 2ft and tread of 3ft.Its construction of reinforced concrete with a cross section as shown. Find the amount of the material used in its construction. Answered by Penny Nom.
	What is 301 million in word form?		2009-01-30
		From chyamber: What is 301 million in word form? Answered by Penny Nom.
	A railway cut		2009-01-30
		From Jean: A railway cut 200ft. long and 30ft. wide at the bottom is made with sloping sides, which are 80ft. and 60ft. in length. The 80-ft. side is inclined 45 degrees and the other side is 35 degrees to the horizontal. Find the cost of removing the earth at $2 per load, if the trucks have capacity of 4cu. yd. Answered by Penny Nom.
	A die is loaded so that...		2009-01-30
		From Larry: Hi. I'm having trouble solving this problem. Would you be kind enough to point me in the right direction? A die is loaded so that the probability of a particular face rolling up is proportional to the number of dots on the face. In other words, getting a six is three times as probable as getting a two. what is the probability of getting an even number in one toss? Answered by Victoria West.
	Shapes		2009-01-29
		From Rana: I want to know about Circumference / Area / Volume of different shapes ie Circle , Oval , An Arc Trapezide etc Answered by Robert Dawson and Harley Weston.
	The height of an isosceles triangle		2009-01-29
		From Mariah: An isosceles triangle has sides 10cm, 10 cm and the base 4cm. How do you find out the height of the triangle? Answered by Penny Nom.
	Will Juanita be late for class?		2009-01-28
		From safdar: juanita bumps into tory in the hallway between period 1 and 2,there is a 45% chance that she will be late for class.if she does not bump into tory, she will make it to class on time. there is a 25% chance that juanita will bump into tory. what is the probability that she will be late on any given day. be sure to introduce your events for this question and show the appropriate formula given the events. Answered by Penny Nom.
	y = |x| - 4		2009-01-28
		From tiana: how do you find where to plot Y in a problem that states y=|x| -4? Answered by Robert Dawson and Penny Nom.
	Ambitious 7th Grader		2009-01-28
		From John: I have been asked to tutor a 7th grader who is very good in math. He is taking the most advanced course that his school offers to 7th graders. This course will cover Algebra 1 over a period of two years, using McDougal Littell's Algebra, Structure and Method, Book 1, a book I like a lot. I have been hired not to help him with his schoolwork, which is too easy for him, but to guide him through something in math beyond his schoolwork. This was his idea, an idea which surprised his parents, but one which they support. Do you have a suggestion for me? If so, I would be very grateful to hear from you. I think this could be a lot of fun for me and my new student, if I pick the right path. Thanks and best regards, John John Answered by Robert Dawson, Victoria West and Walter Whiteley.
	Four digit numbers using 1, 0, 2 and 8		2009-01-27
		From Mike: How many combinations of this four digit number 1028 can this produce only using those numbers. Example would be 0000, 0001,0002,0008,0010,0011,0012,0018,etc... Answered by Penny Nom.
	Graphing a parabola		2009-01-27
		From Kimberly: I need help with this parabola: graph y=5x^2-5x-6. I am not really understanding how to graph parabolas in general. Can you help me? Answered by Penny Nom.

		Page 327/886