Question

find the average rate of change from x=3 to x=15 dor the function f(x)=0.01(2)^x and select the correct answer below
A.0.08
B. 12
C. 27.3
D. 327. 68
I'm leaning towards c or D maybe D

Answer 1

@Rushwr

Answer 2

ok so D

Answer 3

use the formula

rate of change = [f(15)-f(3)]/(15-3)

Answer 4

or a

Answer 5

nope

Answer 6

like I said, use the formula..

f(15) = ?

Answer 7

not a or d

Answer 8

can you not follow instructions?

Answer 9

Ok I thought it was C

Answer 10

please stop guessing...

f(15) = ?

Answer 11

ok then
rate of change = [f(15)-f(3)]/(15-3)
x=3 to x=15
if you use the formula the change in both should be 12

Answer 12

nope.

f(15) - f(3) = ?

Answer 13

15-3=12
f12

Answer 14

nope, that's not how it works.

f(x)=0.01(2)^x

f(15) = ?

Answer 15

15f

Answer 16

no, please pay attention.

f(15) means we let x = 15, and find f(x)

what does f(x) equal when x = 15?

Answer 17

remember, f(x)=0.01(2)^x

Answer 18

3? I'm terrible at math

Answer 19

x = 15

0.01(2)^x = ?

Answer 20

use a calculator if you are unsure

Answer 21

0.08 if i evaluate it with x as 3

Answer 22

no, I just said that x = 15

Answer 23

ok so evaluate 0.01(2)^x = ? so x is 15?

Answer 24

yes, evaluate 0.01(2)^x when x = 15

Answer 25

327.68

Answer 26

good

so

f(15) = 327.63
f(3) = 0.08

now we can plug everything into the formula

rate of change = [f(15)-f(3)] / (15-3) = ?

Answer 27

I just get f

Answer 28

Evaluate f?

Answer 29

f just means a function...

we just found:

f(15) = 327.63
f(3) = 0.08

what is f(15) - f(3)?

Answer 30

12f

Answer 31

no...

Answer 32

f(15) is equal to 327.63

f(3) is equal to 0.08

what is f(15) - f(3)? the answer is NOT 12 f

Answer 33

oh yeah ok

Answer 34

I get 327.55

Answer 35

good, now divide that by (15-3)

Answer 36

27.2958 repeating 3

Answer 37

So I can just make it 30?

Answer 38

we can round that to

27.9

Answer 39

*27.3

Answer 40

oh ok

Answer 41

because the 3 was repeating

Answer 42

and that's our answer, 27.3

Answer 43

So C?

Answer 44

thanks so much