$$2\frac{1}{3} \text{ is to }4\frac{1}{3}\text{ as }7 \text{ is to x}\\\\ \text{Multiply the first two numbers by 3 to get}\\\\ 7 \text{ is to } 13 \text{ as } 7 \text{ is to x}\\\\ \text{So it's now clear what x is!}$$
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Look at the answer here: http://web2.0calc.com/questions/una-pir-mide-quadrangular-recta-d-aresta-10-mm-i-altura-5-mm and use the same method.
A non-trivial, advanced mathematics question! See http://en.wikipedia.org/wiki/P_versus_NP_problem for a discussion.
Have a look at: http://hypertextbook.com/facts/1998/StevenChen.shtml
If you want the volume of the pyramid it is given by (1/3)*area of base*height = (1/3)*10^2*5 mm3 ≈ 166.7 mm3
Your image is very small kes! Can you replace it with one a little larger?
Use the key that looks like √x or type in sqrt and put your number in the parentheses (then press Enter of the = key).
If sin(angle) = 0.857 then angle = sin-1(0.857). This can be done on the calculator using asin(0.857) as asin is the same thing as sin-1
Wilson's theorem says that, if p is a prime number, then (p-1)! = -1mod(p)
However, I haven't been able to see how to use it to prove that 36*27! + 25 is divisible by 31.
Put it diagonally in a 1mx1m package?
+33667 