You need to supply the number of trials and the probability of success per trial.
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In 5 hours he earns £30 therefore
in 1 hour he earns £30/5 so
in 6 hours he earns 6*£30/5 = £36
1st b) Assuming k stays the same (i.e. at 2 hours), then D = 2*9 or D = 18 km
2nd b) Again assuming the proportionality constant stays the same, then D = 1.5*12 or D = $18
See http://web2.0calc.com/questions/the-graph-below-shows-the-cost-c-of-packets-of-juice-n#r4
Do you mean it's like this:
If so, your first solution is correct.
(a) One. The number 2^19 has twenty divisors, all of the form 2^n where n is an integer going from 0 to 19. The only prime involved is the number 2.
We can't tell; we can't see the graph!
The locus (loci is plural) is the set of all points, lines or surfaces that satisfy a given condition.
For example, the locus of all points at the same distance from another point is a circle.
Use the fact that tan(angle) = opposite/adjacent, so angle = tan-1(opposite/adjacent) .
On many calculators (including the one on the home page here) tan-1 is called atan (press 2nd then atan), which is short for arctan.
The following link might be of use: http://www.atlasoftheuniverse.com/bigbang.html
I would just point out that the Earth (and everything else in our universe) came from within the big-bang. The big-bang wasn't simply a big explosion in our nearby (or far-distant) space.
+33669 
