Compounding

You use the following formula when compounding: A(t)=Ao(1+r)^t

Ao=starting amount

R=rate

T=amount of time compound in given time

You use the following formula when doubling, tripling, halfing, etc.: A(t)=Aob^(t/k)

Ao= starting amount

B=doubling, tripling, halfing, etc. 

T=amount of time

K=how long it takes to double triple, etc. 

To find out how long it takes for something to double use the Rule of 72: 72/r

R=rate 

When compounding continuously, you use: P(t)=PoE^(rt)

Po=starting amount

E=on ln button

R=rate

T=time

Example 1: How long does it take for a given about to double at a rate of 3% increase per year? 

72/3=24 years

Example 2: How long does it take for an amout to double at a rate of 60% increase per year? 

72/60=1.2 years