Question

Medal for help ?

Answer 1

Whatcha need help with? :3 :D

Answer 2

Which exponential function goes through the points (1, 16) and (4, 128)?

f(x) = 4(4)x

f(x) = 8(2)x

f(x) = 8(2)-x

f(x) = 4(4)-x

Answer 3

Oh, I can't help you with this. I'm sorry. :( @ganeshie8 may be able to, though!

Answer 4

Thanks :)

Answer 5

@ganeshie8 can you help

Answer 6

@jadee27p How these functions are exponential ?

Answer 7

what

Answer 8

There is no exponential terms.

Answer 9

There has to be or the question wouldnt make sense

Answer 10

Yes I am saying this thing.
Where is your exponential term in the given functions?

Answer 11

It is B my friend

Answer 12

Thats what i needed help with.

Answer 13

how?

Answer 14

Here's how:
you start with general exponential function
y=a(bx)

plug in the given points for x,y
a∗b=16

a∗b4=128

solve for a,b by substitution
from 1st equation, solve for a
a=16b

sub into 2nd equation
16b∗b4=128

solve for b
16b3=128

b3=8

b=2

plug back in to get a
a=162=8
y=8(2x)

Answer 15

Done!

Answer 16

wow thanks, can you check 3 that i already did?

Answer 17

Ok

Answer 18

MEDALS!

Answer 19

Brenda made cheesecakes every weekend. The more cheesecakes she made, the more practice she gained. The time she took to make the same amount of cheesecake every week decreased with practice. The function below shows the number of hours f(x) Brenda took to make a cheesecake after she had made it x times.

f(x) = 4(0.5)x

Which graph best represents the function?

graph of function f of x equals 4 multiplied by 0.5 to the power of x

graph of function f of x equals 0.5 multiplied by 4 to the power of x

graph of function f of x equals 0.5 to the power of x

graph of function f of x equals 4 to the power of x

Answer 20

D

Answer 21

Correct

Answer 22

Evaluate. fifth root of 8 multiplied by square root of 8 over cube root of 8 to the power of 5

8 to the power of negative 3 over 10

8 to the power of negative 41 over 30

8 to the power of negative 29 over 30

8 to the power of 71 over 30

Answer 23

B

Answer 24

Simplify. square root of 7 over fourth root of 7

7 to the power of negative 3 over 4

7 to the power of 1 over 4

7 to the power of 3 over 4

7

Answer 25

chose D for this one

Answer 26

The function f(x) = (1.008735)12x models the monthly interest that a bank offers to Dan after x years. Dan converts the function to have x isolated in the exponent. What is the approximate rate of growth?

11%

12%

13%

14%

I was thinking this as B but I'm doubting it. @Broskishelleh

Answer 27

11% a