High School

How does [tex]f(t) = 7^t[/tex] change over the interval from [tex]t = 1[/tex] to [tex]t = 3[/tex]?

A. [tex]f(t)[/tex] increases by 14%
B. [tex]f(t)[/tex] decreases by 49
C. [tex]f(t)[/tex] increases by a factor of 49
D. [tex]f(t)[/tex] decreases by 14%

Answer :

Final Answer:

The function f(t) = [tex]7^t[/tex] increases by a factor of 49 over the interval from t = 1 to t = 3.

Explanation:

To understand how the function f(t) = [tex]7^t[/tex] changes over the given interval, we can evaluate it at t = 1 and t = 3 and then compare the results.

At t = 1, f(1) = [tex]7^1[/tex] = 7.

At t = 3, f(3) = [tex]7^3[/tex] = 343.

Now, let's calculate how much f(t) increases from t = 1 to t = 3:

Increase = f(3) - f(1) = 343 - 7 = 336.

To determine the factor by which f(t) increases, we can divide f(3) by f(1):

Factor of Increase = f(3) / f(1) = 343 / 7 ≈ 49.

So, the correct statement is that f(t) increases by a factor of 49 over the interval from t = 1 to t = 3.

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