Answer:
a. 1080
b. 405
Step-by-step explanation:
Function evaluation is often conveniently done using a calculator. Many calculators know about the order of operations, so can be used without fear of an incorrect evaluation.
a)
Put the value where the variable is and do the arithmetic.
f(x) = 40(3^x)
f(3) = 40(3^3) = 40(27) = 1080
b)
g(x) = 5(3^(x+1))
g(3) = 5(3^(3+1)) = 5(3^4) = 5(81) = 405
