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tan(x)=57.2900 = x=((180*atan_rad((5729/100)))/(pi)), or approximately 89 degrees.

It is very well explained at this link:

http://betterexplained.com/articles/prehistoric-calculus-discovering-pi/

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R u including teachers?

Thanks, I can't seem to figure out how to transfer the watts to kwh for 7 cents a day

1) At $0.07 per kWh, what is this energy worth per day

2) The system will cost $60,000 to install. How many years will it take to pay off the system from the savings?

3.95+4.45+2.08+.7+1.18=12.36

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As below:

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256^256 =3.231700607131100730071487668867x 10^616

Do you mean:   \(\sqrt{-4}\times \sqrt{-9} \rightarrow 2i\times 3i \rightarrow 6i^2 \rightarrow -6\)  ?

50000*(1+2.5%)^28

50,000(1+.025)^28

FV=50,000 x 1.025^28

FV=50,000 x 1.9964950

FV=$99,824.75

Infinity is NOT a number but an abstract "Idea" or a "Concept". There is nothing to count!.

2L = 2000 cm^3 so 

pi*r^2*10 = 2000

r^2 = 2000/(pi*10)

r = sqrt(200/pi) ≈ 7.98 cm

x + yi              --->      -3 + 5i            --->      x  =  -3     and     y  =  5

rcis(theta)      --->     r  =  sqrt( x² + y² )     --->     r  =  sqrt( (-3)² + (5)² )     --->     r  =  sqrt( 34)

                      --->    theta  =  tan^-1( y/x )     ===>     theta  =  tan^-1( 5/-3 )     --->     theta  =  120.96^o 

sqrt(34) · cis ( 120.96^o )

FV=PV[1 + R ]^N

FV=8,500[1 + 0.10/52]^15*52

FV=8,500[1 + 0.001923077]^780

FV=8,500[1.001923077]^780

FV=8,500 x 4.475238

FV=$38,039.52

Since it is a geometric progression, it has a common ratio:  r

Therefore:  x = 5·r

                   y  =  x·r  =  (5·r)·r  =  5r²

                   z  =  y·r  =  (5r²)·r  =  (5·r·r)·r  =  5r³ 

              405  =   z·r  =  (5r³)·r  =  (5·r·r·r)·r  =  5r⁴

Therefore  5·r⁴  =  405     --->     r⁴  =  81     --->     r  =  3     or     r  =  -3

There are 4 "steps" going from 5 to 405:  first step going from 5 to x; second step going from x to y; third step going from y to z; and fourth step going from z to 405.  These 4 "steps" give the exponent upon r.

Can also look at this this way:

When \(\theta << 1 \) then \(\sin \theta \rightarrow \theta\)

As \(x \rightarrow \infty \quad \frac{a}{x}<<1\)  so  \(x \times \sin \frac{a}{x} \rightarrow x\times \frac{a}{x} \rightarrow a\)

New record prime: 2^274,207,281-1 with 22,338,618 digits by Cooper, Woltman, Kurowski, Blosser.

z = -3+5i

Algebraic form:
z = -3+5i

Exponential form:
z = 5.8309519 × ei 120°57'50″

Trigonometric form:
z = 5.8309519 × (cos 120°57'50″ + i sin 120°57'50″)

Polar form:
r = |z| = 5.83095
φ = arg z = 120.96376° = 120°57'50″ = 0.67202π

speed = Distance/time

60 seconds = 1 minute 

∴ 60 * 50 = 3000 seconds ⇒ 520/3000 = 0.17333333333 

∴ riders speed is 0.173m/s (3 S.F)

A good start would be to turn off caps lock

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