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doubling

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Doubling the area of a pamphlet 2015-10-31
Mariam pose la question :
A pamphlet has the following dimensions: 4 cm by 6 cm If the area of the pamphlet is doubled, what will be the length of each side if sides can be integer values only?
Penny Nom lui répond.
Doubling the dimensions of a cone 2014-11-21
Hannah pose la question :
If the volume of a cone of height 10 cm is 261.8 cm3, show that this volume is increased by a factor of 8 if the dimensions of the cone are doubled.
Penny Nom lui répond.
Two problems 2010-04-13
Dorothy pose la question :
1. Explain why the number 123, 456, 789, 101, 112 cannot be a perfect square. (Hint: What is the units digit?)

2. A substance doubles in volume every minute. At 9:00A.M., a small amount is placed in a container. At 10:00A.M., the container is just full. At what time was the container one-eighth full?

Robert Dawson lui répond.
A cube with twice the volume 2010-04-11
Woojin pose la question :
From a given cube create another cube with twice the volume. the cube: 5cm each.
Tyler Wood lui répond.
How much will i have saved in that year? 2009-12-18
Loretto pose la question :
If i save a penny and it doubles every day for one year how much will i have saved in that year
Robert Dawson lui répond.
A number that ends with 2 2008-06-23
Jim pose la question :
A number ends in 2. If you were to place that digit at the beginning of the number, the resulting number will be twice the original. Find the smallest such number.
Stephen La Rocque lui répond.
Doubling every day 2007-10-07
Jerrie pose la question :
Patti saved pennies for 10 days. The first day she saved 1 cent. Every day after that she saved twice as much as the day before. How much money did Patti save altogether?
Stephen La Rocque lui répond.
Doubling time 2005-03-12
Nick pose la question :
Looking for the equation to how many years it will take to double the population given the growth rate is 7%.
Penny Nom lui répond.
33 3/4 doubled 2004-05-22
A tailor pose la question :
need to know how to add 33 3/4 doubled. How do I come up with the solution? I need to know for measuring garments. Usually I measure on the half meaning on the front of the garment and then double it with the measuring tape but I always get stuck when I need to measure 3/4 such as 66 3/4 doubled and etc. Can you help me figure this out easily.
Penny Nom lui répond.
Doubling the size of an object 2003-04-01
Dave pose la question :
If I have a known surface area and volume of an unknown object and I want to double the size of the object, how do I find the new area and volume?
Walter Whiteley lui répond.
7x6 by doubling 2001-01-23
A student pose la question :
Can you think of a way to use doubling to multiply 6x7?
Allen Herman lui répond.
A colony of bacteria 2000-04-22
Nicci Demmin pose la question :
Suppose that the bacteria in a colony can grow unchecked, by the law of exponential change. The colony starts with one bacterium and doubles every half hour. How many bacteria will the colony contain at the end of 50 hours?
Penny Nom lui répond.
 
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