Question

HELP PLEASE!! MATH HELP!!!

Answer 1

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Below are the answers:

1. B. f(x)=20(35)x
2. C. f(x)=40(2.25)x
3. A. f(t)=35,400(0.02)t
4. First graph. 

Answer 2

1. The graph is of exponential decay and the equation should be in the form:
f(x) = a (k^-x)
where a is the initial value and k is the multiplicative rate of change. Among the choices, there is no exact correct answer. Most probably, the answer is:
D. ​ f(x)=20(53)x ​

2. The exact answer is:
C. f(x)=40(2.25)x
Since the initial value is 40 and the multiplicative rate of change is 2.25

3. The answer is
D. f(t)=35,400(1.02)t
Since the initial value is 35400 and the increase is 2%

4. Given this:
{(1,80),(2,240),(3,720),(4,2160)}

The function in sequence form is:
p(t) = 80(3)^(t-1)