Answer:
(a)
--- The function
(b)
--- The salary in 5 years
Step-by-step explanation:
Given

Solving (a): Model the function around (1,24100) and (3,36600)
First, we calculate the slope




The function is then calculated as:




Solving (b): Salary in 5 years
Here:

So:



Its a right angled triangle. You have C and have B all you need to find is A. usually for a question like this you would use the Pythagorean theorem which is A2+B2=C2 but since we already have c we will use C2-B2=A2
Now we fill in the values. (21)2-(9)2=A2
441-81=360^2 so now with the 360^2 we have to squareroot it so the square root of 360 is 18.973f
Answer:
The answer to your question is x = 23.36
Step-by-step explanation:

Solve for x
1250 = 500(1.04)

Apply logarithms

log 2.5 = x log 1.04
x = 0.398 / 0.017
x = 23.36