Answer:

Step-by-step explanation:
The exponential function that decrease by 15% every time x increases by 1 is given by:

We simplify the parenthesis to get:

Therefore the decrease by 15% every time x increases by 1 is

The second choice is correct.
Answer:
x=3/4
Step-by-step explanation:
x/3=1/2^2
4x=3
4x/4=3/4
x=3/4
Answer:
C
Step-by-step explanation:
when x=0, y=0, so B is impossible
when X=2, Y=1,
and thus C is correct
Answer:
<u>36</u>
Step-by-step explanation:
You multiply 40% by 90. Or make 40% 0.4 and multiply that by 90.