Here's my question:
A rumour spreads exponentially through a college. 100 people have heard it by noon, 200 by 1pm. How many people have heard it
a) by 3pm b) 12.30pm c)1.45pm
thanks in advance.
Here's my question:
A rumour spreads exponentially through a college. 100 people have heard it by noon, 200 by 1pm. How many people have heard it
a) by 3pm b) 12.30pm c)1.45pm
thanks in advance.
Hints:
(a) the number doubles every hour, i.e. multiplies by $2$
(b) the number multiplies by $\sqrt{2}$ every half-hour
(c) the number multiplies by $2^\frac14$ every quarter of an hour