







Histograms. 
19970926 

David Wilson pose la question : I need some help to teach my daughter the functions and the techniques involved in solving histograms. She is in the 7th grade and is in a prealgebra class. She was give these as homework, however there is no section in her book explaining what a histogram is or how to solve them. Thanks! Penny Nom lui répond. 





Cos(x) Cos(2x) Cos(4x)=1/8 
19970924 

Tan Wang pose la question : How many distinct acute angles x are there for which cosx cos2x cos4x=1/8? Chris Fisher Harley Weston and Haragauri Gupta lui répond. 





A Geometry Problem 
19970918 

Rebecca Henry pose la question : A circle is centered at the vertex of the right angle of an isosceles triangle. The cirlce passes through both trisection points of the hypotenuse of the triangle. If the length of a radius of the circle is 10, find the area of the triangle. Chris Fisher Harley Weston lui répond. 





A Trigonometric Limit 
19970918 

Brian Ray pose la question : What is the limit, as x approaches 0, or tan^23x/x^2? (read, tan squared 3x over...)? Harley Weston lui répond. 





Imperial System of Measurement. 
19970917 

Judy Pardilla pose la question : Please also give the solution to the answers. Thank you.  If a room is 12 feet by 15, how many square yards are there?
 If a single roll of wallpaper will cover 30 square feet, how many single rolls will it take to cover a wall 8' x 15'?
 If ceramic tiles are 8" x 8", how many tiles would it take to cover an area 4' x 6'?
If possible, can you email me a table for imperial measurements. Thank you! Penny Nom lui répond. 





Rowing on the Charles River. 
19970917 

Fawwaz Muraisi pose la question : On the Charles River in Boston, the Harvard bridge and the Longfellow bridge are 1 mile apart. The MIT crew starts rowing upstream at the Longfellow bridge. As the crew passes under the Harvard bridge, the coxswain's hat falls into the river. Ten minutes later, the coxswain notices and turns the boat around instantaneously. He has t he crew row back to get it, rowing at the same constant rate. By the time the team reaches the hat, they are back at the Longfellow bridge.How fast is the river flowing? Harley Weston lui répond. 





A Limit Problem 
19970916 

Robert Reny pose la question : what is the limit, as x approaches 0, of 3x/2x[x]? [] means absolute value. Harley Weston lui répond. 





Billions and more! 
19970915 

Mahabir B. Gupta pose la question : I would like to know how you americans write the number 1 billion. Do you say "One thousand million"..can you answer by giving me examples? 1,000,000> 1 million 1,000,000,000>1 billion Why is it that in spanish it is different? Penny Nom lui répond. 





Integer Problems. 
19970915 

Eric Kowalsky pose la question : I have some intergers I can't solve. Please help me solve them! Please show me how you got the answer. 5(4)[3(6)+(3)4(2(4)7)]+3(8)=
 2[73(4)+52(1)]+3(6+8)=
 4[6(27)5(7+2)]=
 7(4)2[3(4+6)+6(73(4))]
P.S. Thank you very much. Harley Weston lui répond. 





The Range of a Function. 
19970912 

Karel Marek pose la question : Math Is Book 6 (Ebos/Tuck) question 5(b) gives a surprising answer at the back of the book..The question is: Indicate the domain and range for this: y = sqr(x9) (Square root of) The answer for the domain is x>=9 which is not surprisingly, but the range is y>=0, yER ... which I could understand if you were not allowed to transform the equation into x as the subject.. But all example on the facing page DO TRANSFORM the equation at will with x and/or y as the subject.. Can you explain this... ?? Chris Fisher lui répond. 





Triangular Numbers. 
19970908 

Rachel pose la question : Show visually that the square number 16 is the sum of two triangular numbers. Which two? Penny Nom lui répond. 





Definitions 
19970908 

SohoGirl13 pose la question : I am an 8th grader. my email address is SohoGirl13@aol.com. I have a question: what are the associative, communitive, and distributive properties? Harley Weston lui répond. 





A Finite Math Question. 
19970907 

Angela L. pose la question : How many threedigit numbers can be formed using only the numbers 1 to 7 if the number 2 must be included? Penny Nom lui répond. 





Prime Numbers 
19970904 

Jack Bedard pose la question : Hi. I have a real stupid question What are prime numbers? My name is Jack Bedard and I am in grade 5. Penny Nom lui répond. 





Square Root History 
19970829 

Carlos Montecel S. pose la question : I need find information over the "Square Root History", Could you help me? Harley Weston lui répond. 

