$${\frac{{\mathtt{105}}}{{\mathtt{8}}}} = {\mathtt{13.125}}$$ days
I'm not sure the intention of the question, but I look at it in two ways; the square root of (1+2) or the square root of (1), +2. I assume it is the first one.
$$\sqrt{1+2}=\sqrt{3}\approx1.732$$
$$\sqrt{1}+2=1+2=3$$
$${{\mathtt{20}}}^{{\mathtt{5}}} = {\mathtt{3\,200\,000}}$$
Yeah I just typed it in.
I might just do that
You can see where I used the eraser to make the dotted line
Thanks
Is that a program?
No I just used paint
$${\frac{{\mathtt{28}}}{{\mathtt{42}}}} = {\frac{{\mathtt{2}}}{{\mathtt{3}}}} = {\mathtt{0.666\: \!666\: \!666\: \!666\: \!666\: \!7}}$$
Multiply by 100 to get a percent . . .
67% (nearest %) or 66 and 2/3%
% = out of 100
$$6-4(x+3)$$ (expand brackets)
$$6-4x-12$$ (simplify)
$$-4x-6$$
Area = half base times height or $$\frac{b}{2}h$$
+980 
