Question

What is the approximate value of f(5) for the function f(x)=6.87(2.5)(x – 1)?

Answer 1

68.7

Explanation:

We need only estimate (approximate) the value of f(x) at x = 5:

f(x)=6.87(2.5)(x – 1) → f(5)=6.87(2.5)(5 – 1).

Note that 2.5(4) = 10, so now we have (exactly) f(5)=6.87(10), which, in turn, is

equal to 68.7.