Alan

zegroes is correct.

There is no last digit of pi, and no chance that there ever will be!   If it had a last digit it would be rational, that is, it could be expressed as the ratio of two whole numbers.  However, pi has been proven to be irrational, which means it cannot be expressed as a ratio of two whole numbers.

The horizontal distance, d, is the adjacent side of a triangle of which the kite length is the hypotenuse, so 

cos(40°) = d/25

Multiply both sides by 25

d = 25*cos(40°) feet

$${\mathtt{d}} = {\mathtt{25}}{\mathtt{\,\times\,}}\underset{\,\,\,\,^{\textcolor[rgb]{0.66,0.66,0.66}{360^\circ}}}{{cos}}{\left({\mathtt{40}}^\circ\right)} \Rightarrow {\mathtt{d}} = {\mathtt{19.151\: \!111\: \!077\: \!975}}$$

d ≈ 19.15 feet

Are you just looking to simplify the expression? If so:

8 - 6(7 - 4t) + 4t = 8 - 6*7 + 6*4t + 4t = 8 - 42 +24t +4t = -34 + 28t

(-1+i)^7=(-1+i)^2(-1+i)^2(-1+i)^2(-1+i) $$\\ $$ (-1+i)^2 = 1-2i+i^2=1-2i-1=-2i $$\\ Therefore$$ (-1+i)^7=(-2i)^3(-1+i)=(-2)^3i^3(-1+i)=8i(-1+i)=-8-8i$$

What do you mean by solve here?  You can derive a power series for the expression (the first 7 terms of which are shown below - there are an infinite number of terms), but it doesn't look very interesting!

1 scruple = 1.2959782 grams

Note that L must be a multiple of 10 to avoid having a fraction of a sandwich!  (Hint: try L = 70).

Maple 15 gives the following result for c.

In other words it says it doesn't converge.

Do you mean the following?

\frac{2014^3-4*2014}{2014^2+2*2014} $$\\ $$ =\frac{2014*(2014^2-4)}{2014*(2014+2)} $$\\ $$ =\frac{(2014-2)(2014+2)}{2014+2} $$\\ $$ =2014-2 = 2012

Add 9.5904 to both sides

709.5904 = 22.9582*ln(x)

Divide both sides by 22.9582

709.5904/22.9582 = ln(x)

This means that x = e^{(709.5904/22.9582)}

$${\mathtt{x}} = {{\mathtt{e}}}^{{\frac{{\mathtt{709.590\: \!4}}}{{\mathtt{22.958\: \!2}}}}} \Rightarrow {\mathtt{x}} = {\mathtt{26\,493\,706\,281\,623.85}}$$