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Find the scaling ratio
Perimeter of first pentagon is 12*5=60 cm
Scale factor (2nd/first)=140/60 =7/3 Ratio of areas varies as the square of the scale factor for the lengths
Area of second / area of first =(7/3)^2 =49/9
Area of second pentagon =248 *(49/9) cm^2
Finish the calculation.
Unless you are meaning something more specific, ratios are calculated through simple division. For example if there are 2 oranges and 4 apples, the ratio of oranges to apples is 2:4, and the ratio of oranges to the total number of pieces of fruit is 2:6. These ratios can also be expressed in fraction form: there are 2/4 as many oranges as apples, and 2/6 of the pieces of fruit are oranges. If necessary you can perform the calculation 2/4 = 2 therefore there are .5 (half) as many oranges as apples and 2/6 = 0.33333333333333 therefore approximately .333 pieces of fruit are oranges.
On your calculator you should simply need to use the division button to accomplish this.
A ratio is a division of two quantities that may or may not have the same units. Example of a ratio: Speed =distance/time, specific gravity (density) =mass/volume.
Simplifying a fraction is writing it with the smallest numerator and denominator. In that case one says that the fraction is in its reduced form. 35/20=(5*7)/(5*4)=(5/5)*(7/4)=7/4 7/4 cannot be reduced further, so we say the reduced form of 35/20 is 7/4
The calculator's memory is limited. The largest number it can handle is about 10^100 and that is a bit more then 69!
It you are trying to calculate the permutation and/or combinations, which involve the ratios of factorials nPr=n!/(n-r)! and nCr= n!/((n-r)!r!) you will have better luck using the relevant commands directly and not use the above divisions.
When you are calculating ratios by hand (why would you do that? you might ask) there is a simple trick you can take advantage of. It involves expanding the factorial in the numerator as in the following example: Calculate 7!/4!=7*6*5*4!/4!=7*6*5=210.
The average is 20, it means the total is 60. The sum of ratio is 15 (3+5+7) Therefore the age of a girl is calculated by multiplying the respective ration with total and dividing by sum of ratio Age of Eldest girl = 7 x 60 /15 = 28
Ann has 80 pesos and Rosa Has 140 pesos. Calculated by taking the 4 to 7 ratio and keep multiplying until you reach the 60 pesos difference which is 4X20=80 and 7X20=140. 140 minus 80 = 60.
Hello, Read the definition of equivalent ratios. Choose the numbers a and b such that a/b=7/17. (Here is a HINT: The operation to perform to obtain a from 7 and b from 17 is the inverse operation that you use to reduce a fraction to its simplest form.) Once you dtermine how you are going to construct a and b, the calculator can then help you express each one as a single number. Sorry I cannot be more specific: You have to make a little effort to understand what you are supposed to be doing.
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