Answer: 
Step-by-step explanation:
The exponential growth function in time t is given by :-

, where a = Initial amount
b = Multiplicative factor.
Given : When it was first started, the Clinton High Cooking Club had 10 members.
The number of members increased by a factor of approximately 1.21 .
As per given , we have
A= 10
b=1.21
Then , the function that gives the number m(t) of members in the cooking club t years after it started will be :
(Put values in the above function)