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Transporting bananas 2000-10-18
From Krystie:
A farm has 45 bananas, a man has to take a truck and transport 15 bananas to a market that is 15 miles away. Every mile he travels, he must eat a banana. I have to get at least one banana to the market
Answered by Penny Nom.
A chord length 2000-10-17
From Al Paas:
How to determine the length of a chord given the diameter of the circle and the maximum distance from the chord to The circle?
Answered by Chris Fisher.
Multiplying decimals 2000-10-16
From Lily:
I need help with mutiplying decimals (example) 2.28*0.48( * = times).
Answered by Harley Weston.
Area of shapes 2000-10-14
From Melanie:
What is the formula to calculate the area of different shapes?
Answered by Harley Weston.
2-step equations 2000-10-11
From Jen:
i don't get how you find the answer to these equations

140= -4 -12e

x/-2 + 6 = 4


Answered by Penny Nom.
Where will we use this in the real world? 2000-10-11
From Jane Ann Musgrove:
As a teacher of mathematics, I am always asked "Where will we use this in the real world?". I am seeking ideas/sites via the internet where students can find answers to this type of question. Can you help me?

To be more specific, right now I am interested in finding careers where the employees would use the concepts of "Radicals", "Matrices", and "Logarithms". This information will be used by students to make presentations to the class on their findings from internet searches.


Answered by Harley Weston.
Larger and smaller 2000-10-10
From Nicole:
which one of these arrows < , > points to the greater number? which arrows points to the smaller number.
Answered by Penny Nom.
The sum of the cubes is the square of the sum 2000-10-10
From Otoniel:
Without using mathematical induction, or any other method discovered after 1010 a.d. , prove that the sum of i3, (where i, is the index of summation) from one to, n, is equal to ((n*(n+1))/2)2
Answered by Penny Nom.
Hendecagon 2000-10-09
From Jillian:
I need an example of a object that is in the shape of a hendecagon. I know what the shape is but I cannot come up with a real life example of an object that is this shape.
Answered by Chris Fisher.
Sunflower seeds 2000-10-09
From A parent:
Find the number of 3/4 pound of sunflower seeds that can be filled with 225 pounds of sunflower seeds
Answered by Penny Nom.
Independent tests 2000-10-07
From A student:
If the false-positive rate of each test in a battery of tests is 0.05, how many independent tests can be included in the battery if we want the probability of obtaining at least one false-positive result to be at most 0.2?
Answered by Harley Weston.
Repeating decimals 2000-10-06
From Mary O'Sullivan:
I understand that with repeating decimals (those with a pattern), the number of digits repeated is put into fraction form with the same number of 9's

ex. 0.4444 = 4/9 0.145145145 = 145/999

How can I explain why this is so? Some inquisitive 8th graders are anxious to find out!
Answered by Penny Nom and Walter Whiteley.

Cutting the cake 2000-10-05
From Cherie:
How can you divide a cake (circle) into 14 pieces by using only 4 straight lines?
Answered by Penny Nom.
Pillows and Cushions 2000-09-27
From Fiona:

The following problem was given to grade eleven algebra students as a homework assignment. To manufacture cushions and pillows, a firm uses two machines A and B. The time required on each machine is shown. Machine A is available for one full shift of 9.6 hours. Machine B is available for parts of two shifts for a total of 10.5 hours each day.
Answered by Harley Weston.

Isolating an exponent 2000-09-24
From C. Scott:
Suppose you invest $500.00 in an account that pays 10% interest compounded annually. How long will it take for this value to triple?

A=p(1 + i)a A=1500 i=0.1
1500=500(1.1)a p=500 a=unknown

How do you solve this problem algebraicly? How do you isolate the variable (a) when it is an exponent?


Answered by Harley Weston.
 
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