The recursive formula which is used to determine the total amount of time spent making hats based on the total amount of time spent previously is f(n+1)=f(n)+0.75. The correct option is B.
Given the time spent by making a hat is shown in attached image.
We have to find the recursive formula which is used to satisfy the given condition.
A recursive formula relates each term in the sequence to the previous term in the sequence. This is different from the explicit expression.
As it is given that f(1)=1.5, f(2)=2.2.5, f(3)=3.0 and f(4)=3.75
According to the definition of recursive formula, we will firstly find the difference between f(2) and f(1), we get
f(2)-f(1)=2.25-1.5
f(2)-f(1)=0.75
f(2)=f(1)+0.75,
Now, we will find the difference between f(3) and f(2), we get
f(3)-f(2)=3.0-2.25
f(3)-f(2)=0.75
f(3)=f(2)+0.75,
Similarly, we will find for others.
.....
f(n+1)=f(n)+0.75
This is the arithmetic sequence with common difference 0,75.
Hence, according to the question, the recursive formula can be used to determine the total amount of time spent making hats based on the total amount of time spent previously is f(n+1)=f(n)+0.75.
Learn more about the recursive formula from here brainly.com/question/1980730
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