# Is this an exponential type question

• October 1st 2011, 05:47 AM
David Green
Is this an exponential type question
A group of people are asked ten questions, if they get 1 question right they get a £5, if the get two right they get £10, if they get 3 right they get £20.
• October 1st 2011, 06:21 AM
Quacky
Re: Is this an exponential type question
That isn't a question at all. Are you trying to find something?

The formula you'd need to express it does involve an exponent. You're going to have to be more specific.
• October 1st 2011, 06:25 AM
Plato
Re: Is this an exponential type question
Quote:

Originally Posted by David Green
A group of people are asked ten questions, if they get 1 question right they get a £5, if the get two right they get £10, if they get 3 right they get £20.

It is exponential: $5\cdot 2^{n-1}$.