







A flat top cone 
20190825 

From Mary: I want to make a paper model of a flat top cone with the radius of the base is 12.5 cm and the radius of the apex is 7 cm.The height is 15 cm and the radius of the apex is 5 cm. The height is 15 cm.
Can you help me with the angle and construction, please?
Thanks. Answered by Penny Nom. 





A silo with a flat side 
20080714 

From Amy: Without using the Pythagorean Theorem, determine the capacity of a silo in cubic feet of grain if: the cylindershaped silo has one flat, rectangular face that rests against the side of the barn; the height of the silo is 30 feet and the face resting against the barn is 10 feet wide; the barn is approximately 5 feet from the center of the silo. Answered by Harley Weston. 





What solid figure has 1 flat surface and 0 vertices? 
20080130 

From Cheronda: What solid figure has 1 flat surface and 0 vertices? Answered by Stephen La Rocque and Harley Weston. 





Inflation rate 
20071214 

From cassie: In 1972, Bob could fill his car with gasoline at a cost of $3.00.
In 2007 it cost him $45.00 to fill his car. From 1972 to 2007, what
is the annual inflation rate for gasoline?
How does this inflation rate change when you change the cost to
$0.25 per gallon in 1972 to $3.20 per gallon in 2007? Answered by Stephen La Rocque. 





How many flat surfaces does a cylinder have? 
20060214 

From Kimia: How many flat surfaces does a cylinder have? Answered by Stephen La Rocque. 





A four dimensional object 
20010214 

From A student: Can you give me some examples of a four dimensional object you can find around your house? Answered by Harley Weston. 

