Question about Office Equipment & Supplies

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Posted on Jan 02, 2017

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SOURCE: TI-83 Plus No Longer Squares Correctly

when you type -2 imagine your calculator doing the equation: -1 x 2. The - sign actually stands for a -1 so when you do -2 squared your calculator is simply following order of operations. It first squares the 2 making it 4, then it multiplies the negative making it -4. In order to get around this you must use parenthese. (-2)^2.

Hope this helped

Posted on Nov 23, 2008

The circumference (perimeter) of a circle is given by the formula

C = 2 (pi) (r), where r is the radius. Since radius is half of the diameter, d = 2 (r), so C = (pi) d.

Dividing both sides by d to get pi by itself, pi is the circumference of a circle divided by the diameter.

Pi is irrational, meaning that it goes on forever, without repeating numbers and cannot be represented as a fraction.

In everyday life, we often use 22/7 as an approximation of pi. Other people use 3.14.

I have memorized what my calculator gave me plus one more decimal, 3.1415926536.

Others have memorized it to thousands of digits and people have spent their lifetimes calculating pi to more and more decimals. Books have been written about pi.

Some schools celebrate Pi Day, since Pi begins with 3.14, it is celebrated on March 14th.

Good luck,

Paul

https://en.wikipedia.org/wiki/Pi

C = 2 (pi) (r), where r is the radius. Since radius is half of the diameter, d = 2 (r), so C = (pi) d.

Dividing both sides by d to get pi by itself, pi is the circumference of a circle divided by the diameter.

Pi is irrational, meaning that it goes on forever, without repeating numbers and cannot be represented as a fraction.

In everyday life, we often use 22/7 as an approximation of pi. Other people use 3.14.

I have memorized what my calculator gave me plus one more decimal, 3.1415926536.

Others have memorized it to thousands of digits and people have spent their lifetimes calculating pi to more and more decimals. Books have been written about pi.

Some schools celebrate Pi Day, since Pi begins with 3.14, it is celebrated on March 14th.

Good luck,

Paul

https://en.wikipedia.org/wiki/Pi

Jan 04, 2017 | Office Equipment & Supplies

area formula is PI x r squared

that is 3.1417 times the radius of the circle squared

example is:- 3.1417 times 3 inches squared =3.1417 times 3x3=3.1417x9=28.279 square inches if you want to work back from a circumference measurement, the formula for circumference is 2 x PI x radius or PI x diameter

if you have a circumference of 12 inches then the dia is calculated 12 inches = dia x PI to get the diameter , divide the 12 inches by PI and that will be the diameter so that is 12 divided by 3.1417 =3.819 inches

now you can go from the first formula the radius is the diameter divided by 2 so the radius will be 3.819 divided by 2 = 1.909 inches

so applying the area formula it becomes 3.1417 times 1.909 times 1.909 =11.458 square inches

to find your answer simply substitute the dimensions in place of the example figures.in the relevant formula.

that is 3.1417 times the radius of the circle squared

example is:- 3.1417 times 3 inches squared =3.1417 times 3x3=3.1417x9=28.279 square inches if you want to work back from a circumference measurement, the formula for circumference is 2 x PI x radius or PI x diameter

if you have a circumference of 12 inches then the dia is calculated 12 inches = dia x PI to get the diameter , divide the 12 inches by PI and that will be the diameter so that is 12 divided by 3.1417 =3.819 inches

now you can go from the first formula the radius is the diameter divided by 2 so the radius will be 3.819 divided by 2 = 1.909 inches

so applying the area formula it becomes 3.1417 times 1.909 times 1.909 =11.458 square inches

to find your answer simply substitute the dimensions in place of the example figures.in the relevant formula.

Aug 24, 2015 | Office Equipment & Supplies

If you want to square an expression enclose it in parentheses and raise to the second power.

Jul 27, 2015 | Casio Scientific Calculator Fx-82es Plus

Circumference of a Circle: 2 x pi x radius - OR - pi x diameter,

or if you need some sphere calculations?

Sphere Surface Area: 4 X pi X radius squared OR

pi X diameter squared Sphere Volume: 4/3 X pi X radius cubed OR

( pi X diameter cubed ) / 6

By the way.......... "pi" = 3.1415926536

or if you need some sphere calculations?

Sphere Surface Area: 4 X pi X radius squared OR

pi X diameter squared Sphere Volume: 4/3 X pi X radius cubed OR

( pi X diameter cubed ) / 6

By the way.......... "pi" = 3.1415926536

Apr 29, 2014 | Office Equipment & Supplies

To make it easier for you below are the figures for the

Radius= 11.5 inches

Height = 17 inches.

Now use the formula above to calculate it.

For the

Radius = 0.25 inches

Height = 0.5

Use the same formula above for jelly bean as well.

Once you have both figures,

AND VOILA, you have the amount of jelly beans in a jar (Round the figure out)

Cheers!

Apr 28, 2014 | Texas Instruments TI-84 Plus Calculator

It is the ratio of a perfect circle's circumference to its diameter, ie

C = Pi * D

It has been calculated to trillions of digits as a decimal without ever beginning to repeat itself. It appears in many formulae describing the universe, including Einstein's General theory of Relatiivty.

C = Pi * D

It has been calculated to trillions of digits as a decimal without ever beginning to repeat itself. It appears in many formulae describing the universe, including Einstein's General theory of Relatiivty.

Apr 09, 2014 | Mathsoft Computers & Internet

Hi,

This is actually a surprisingly difficult question to answer, depending on how much trigonometry and/or calculus experience you have.

The simplest explanation would be to say that pi is the ratio of a circle's circumference to its diameter. Pi = c/d, where c is the circumference and d is the diameter. Meaning, if you drew a perfect circle, and could VERY accurately measure it's circumference and diameter, you could plug those two numbers into your trillion-digit calculator and you would get pi.

Obviously, that's not going to happen... But that would be ideal. I would recommend the pi Wikipedia page, as it discusses the history and evolution of pi calculations: http://en.wikipedia.org/wiki/Pi

Enjoy! -SJ

This is actually a surprisingly difficult question to answer, depending on how much trigonometry and/or calculus experience you have.

The simplest explanation would be to say that pi is the ratio of a circle's circumference to its diameter. Pi = c/d, where c is the circumference and d is the diameter. Meaning, if you drew a perfect circle, and could VERY accurately measure it's circumference and diameter, you could plug those two numbers into your trillion-digit calculator and you would get pi.

Obviously, that's not going to happen... But that would be ideal. I would recommend the pi Wikipedia page, as it discusses the history and evolution of pi calculations: http://en.wikipedia.org/wiki/Pi

Enjoy! -SJ

Aug 06, 2011 | Computers & Internet

When you have to deal with problems of this sort, you usually are given recipes or mathematical formulas which you apply to find the result. It so happens that for the volumes of cylinders, the formula to use is

Volume = Area of the base times the height=Ab*h

If the cylinder is circular, then the area of the base is that of a disk, Ab=PI*r^2`where r is the radius.

In your case, you are given the diameter (twice the radius) and the height.

Volume =PI*h*(6.2/2)^2, the unit being cm^2

To type in the value of PI, press [2nd] [^] (the latter is key under CLEAR, and above the division sign.

To raise a number to power 2 (to square it), use the key marked x with a superscript 2, or x with a raised 2.

After you have typed in all necessary ingredients in the formula, press the [ENTER] key and the calculator will give you the result.

Now, it is your turn to do some mathematics.

Volume = Area of the base times the height=Ab*h

If the cylinder is circular, then the area of the base is that of a disk, Ab=PI*r^2`where r is the radius.

In your case, you are given the diameter (twice the radius) and the height.

Volume =PI*h*(6.2/2)^2, the unit being cm^2

To type in the value of PI, press [2nd] [^] (the latter is key under CLEAR, and above the division sign.

To raise a number to power 2 (to square it), use the key marked x with a superscript 2, or x with a raised 2.

After you have typed in all necessary ingredients in the formula, press the [ENTER] key and the calculator will give you the result.

Now, it is your turn to do some mathematics.

Jun 16, 2011 | Texas Instruments TI-84 Plus Calculator

Pi is a mathematical constant whose value is the ratio of any Euclidean plane circle's
circumference to its diameter; this is the same value as the ratio of a
circle's area to the square of its radius. It is approximately equal to
3.14159265 in the usual decimal notation.

Mar 05, 2011 | Casio FX82MS Scientific Calculator

the formulae for the surface area of round disc is

pi * r * r

where pi=3.14 and r =radious of disc= diametre/2

for this 1st u have 2 calculate the radious of the disc that is

180/2=90mm

then convert it to m by dividing 1000 ,so radious=90/1000=0.09 m

finally calculate the area= 3.14 * 0.09 * 0.09=0.025434 sq metres

for 38 disc multiply 38 with the above area that is

0.025434 * 38=0.966492 sq metres

in excel 2007 u can do it more easily by going 2 formulas tab.

Under formla tab click on engineering formula and then convert

here u can convert from mm to m

after converting use the above formula i just told u.

pi * r * r

where pi=3.14 and r =radious of disc= diametre/2

for this 1st u have 2 calculate the radious of the disc that is

180/2=90mm

then convert it to m by dividing 1000 ,so radious=90/1000=0.09 m

finally calculate the area= 3.14 * 0.09 * 0.09=0.025434 sq metres

for 38 disc multiply 38 with the above area that is

0.025434 * 38=0.966492 sq metres

in excel 2007 u can do it more easily by going 2 formulas tab.

Under formla tab click on engineering formula and then convert

here u can convert from mm to m

after converting use the above formula i just told u.

Feb 27, 2008 | Computers & Internet

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