The exponential function $f$ is defined by $f(x) = ab^x$, where $a$ a… | Ronan SAT

|Question 18Math

Desmos Graphing Calculator

Question

Prompt

The exponential function

f

is defined by

f (x) = a b^{x}

, where

a

and

b

are positive constants. If

f (s) = t

and

f (s + 1) = t - 0.87 t

, where

s

and

t

are constants, what is the value of

b

?

0.13

A

0.87

B

1.13

C

1.87

D