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There is no simple formula; you basically have to count days. Here is an example:

Today, Feb. 8, 2011 is a Tuesday. What date is April 1, 2011?

Count: 20 days remaining in February, 31 days in March, 1 day in April, total 52 days. If you divide that by 7, you have a remainder of 3 (that is to say, 49 days, or 7 x 7 days, from now will again be a Tuesday. Now count off the three days: Wednesday, Thursday, Friday. So the answer is Friday.

You can also use some computer program. For example, Excel has functions to calculate the day of the week for any day within a certain range.

Q: What is the calculation formula to find the day of the week if a date is given?

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To find the circumference of a circle the formula is: 2*pi*radius or diameter*pi

The answer depends on what information is given.

(pi)D

There is no simple formula and, in any case, the answer will depend on what information about the trapezoid is given.

It is often possible to find an explicit formula that gives the same answer as a given recursive formula - and vice versa. I don't think you can always find an explicit formula that gives the same answer.

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You can measure it. Or you can calculate it. The details of the calculation depend on what information is given.

As of 2011 they changed the formula. I do not remember exactly how it works but you can find it here http://www.a1childsupportinfo.com

To find the circumference of a circle the formula is: 2*pi*radius or diameter*pi

The answer depends on what information is given.

You can use a perpetual calendar

If you are talking about math, a formula is a representation of some type of operation, usually between numbers. An example of a formula in Excel is: =12*(34+14). Use use them to find a result of some type of calculation.

given, find, formula, solve, answer

Use point-slope formula

(pi)D

This is 3 separate problems that can be solved using the same equation. Take the coordinates of the points of one side and caluclate the length of the line using the formula. This formula uses the X & Y values to calculate the Length. Repeat the same calculation for the other two sides.

The formula to find the density is d=m/v

There is no simple formula and, in any case, the answer will depend on what information about the trapezoid is given.