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Math and Arithmetic
Math is the study of abstractions. Math allows us to isolate one or a few features such as the number, shape or direction of some kind of object. Then we can study what can be learned about the behavior of those features while ignoring everything else about the object.
893,875 Questions
What is the circumference of a circle with a 25ft diameter?
Use the equation
C = pi*d
Substitute
C = 3.14 * 25
C = 78.5 ft
NB This is only an approximate value, because '3.14' is only an approximate valuer for 'pi' , but convenient to use.
The other eq'n to use is
C = 2 pi r
Where 2r = d ( two radii equals one diameter ) . NB . 'radii' is the common noun plural of 'radius'. NOT 'radiuses'.
What is the ratio of the circumference of a circle to its diameter?
C = pi*d
The ratio is ALWAYS 'pi' for any circle, however, large or small.
pi is approximately 3.141592 , or 3.14, or 22/7
'pi' is an irrational number, which means the decimal digits go to infinity, AND the digits are NOT in any regular order.
What fraction is equal to 1 over 4?
They are NOT equal but Equivalent.
1/4, = 2/8, 4/16. 25/100 , 250/1000
NB Three horizontal lines means 'equivalent to'.
NNB 1/4 =1/4 = 0.25 Are Equal but NOT equivalent; subtle difference.
Yes. Compare digits in corresponding (same) places. 3=3...5>4, so 3.5>3.4
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- cars
- houses
- you can give that much to a charity
several televisions
Why does a ball bounce higher than others?
it will bounce higher if there is more air.
ex. Flat basketball- being flat, the ball will just hit the floor and will be pressed inwards on the spot it landed
pumped basketball- being full of air, the ball hits the ground and like a flat basketball is pressed inwards. but because there's air in it, the air will make the ball retain its shape and bounce.
How old are you if you were born in August 1961?
As of September 2026 , you would be 65 years of age.
3 and 9 is '39'
3 + 9 = 12.
NB Casually, 'and' would generally imply addition.
What is bigger five sevenths or four sixth?
5/7 & 4/6 => 5/7 & 2/3
To compare fractions, bring to a common denominator and equivalent numerators.
Hence
5(3)/7(3) & 2(7)/3(7)
Hence
15/21 & 14/21
Compare the numerators . 15 > 14
Hence
15/21 > 14/21 => 5/6 > 2/3 => 5/7> 4/6
NB When inspecting fractions, look to see if a fraction can be reduced. 4/6 = 2/3 .
Smaller numbers are easier to handle. !!!!!
What is five sixth minus two sevenths equals in simplest form?
5/6 - 2/7
Subtraction of fractions. .
#1 bring to a common denominator and equivalent numerators.
Hence
[5(7) - 2(6)] / (6)(7)
[ 35 - 12 ] /42
23/42
The simplest answer.
15 + 5x
'5' is a factor of both '15' & '5' . So take '5' out!!!
Hence
5(3 + x)
What is the factor of q3-q2 plus 2q-2?
q^(3) + q^(2) + 2q + 2
=>
q^(2)(q + 1) + 2(q +1)
(q^(2)+ 2)(q + 1)
Fully factored.
I’m sorry, but I can’t assist with that. Cheating undermines the purpose of learning and can have consequences in educational environments. It’s always better to engage with the material honestly to truly benefit from the experience.
How do you convert square feet into running feet?
To convert square feet into running feet, you need to know the width of the area in feet. Divide the total square feet by the width in feet to get the running feet. For example, if you have 100 square feet and the width is 10 feet, you would have 10 running feet (100 sq ft / 10 ft = 10 running ft).
How many groups can you make with 16 and 18?
To find the number of groups you can make with 16 and 18, you would typically look for the greatest common divisor (GCD) of the two numbers. The GCD of 16 and 18 is 2, which means you can create 2 equal groups from both numbers. Thus, you can make 2 groups of 8 from the 16 and 2 groups of 9 from the 18.
Is there a website that offers free live help with math for parents of elementary age children?
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