Question

use the following function rule to find f(3).
$f(x) = -3(0.9)^x$
write your answer as a decimal or whole number.
$f(3) = \square$
submit

Explanation:

Step1: Substitute x=3 into function

$f(3) = -3(0.9)^3$

Step2: Calculate $(0.9)^3$

$(0.9)^3 = 0.9 \times 0.9 \times 0.9 = 0.729$

Step3: Multiply by -3

$f(3) = -3 \times 0.729$

Answer:

-2.187