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What is: (235xPI➗X =285

[235 x Pi] / x = 285

738.27 / x = 285 cross multiply

738.27 = 285x divide both sides by 285

x = 738.27 / 285

x = ~2.59

What

5 45\9=5

45dvds / 9dvds per shelf = 5 shelfs

I dont know

y-(2/7) = 3 1/4

y=3 1/4 + 2/7

y=13/4 + 2/7 The GCD of 4 and 7 is 28

y=91/28 + 8/28

y=99/28

y=3 15/28

Using the calculator here, just enter your decimal and press = key to get the answer. Example:0.375, it should display 3/8. Try it.

Statistical file:
{14, 13, 6, 13, 6, 14}


Average (mean): μ=11
Absolute deviation: 20
Mean deviation: 3.33333333333
Minimum: 6
Maximum: 14
Variance: 12.6666666667
Standard deviation σ=3.55902608401
Corrected sample standard deviation s=3.89871773792
Coefficient of variation cV=0.354428885266
Mode: {6, 13, 14} - multimodal
Geometric mean: 10.2977152692
Harmonic mean: 9.52325581395
Sum: 66
Sum of absolute values: 66
Average absolute deviation: 3.33333333333
Range: 8

If 3600000000 equals 2400 what does 800000000 equal?

2400 / 3,600,000,000 x 800,000,000 =533 1/3

500

500

500

500

500

A couce 

e^2  -1  = 6.389

so

10 = x * 6.389

x = 10/6.389 = 1.565176

45 dvds   x    1 shelf/9dvds =  5 shelves

...With an 'A'....