Question

Let f(x)=81+3e−0.7x . What is the value of f(−1) ? Round the answer to the nearest hundredth. Enter your answer in the box.

Answer 1

f(-1)=89.85

Explanation:

Given : Function -
`f(x)=81+3e-0.7x`

To find : f(-1) nearest to hundredth

Solution :

step 1- Write the function

`f(x)=81+3e-0.7x`

Step 2- Put the value of x=-1

`f(-1)=81+3e-0.7(-1)`

Step 3- Solve

`f(-1)=81+3e+0.7`

`f(-1)=81.7+3e`

Value of e is a Euler number e=2.718

`f(-1)=81.7+3(2.718)`

`f(-1)=81.7+8.154`

`f(-1)= 89.854`

Round to nearest hundredth f(-1)=89.85

Answer 2

f(-1)=81+3e-.7(-1)

enter into scientific/ graphing calculator
f(-1)=89.85