Answer:
250 is the initial value and 1.085 is the growth factor.
Step-by-step explanation:
A rare coin's value can be modeled with the equation
................. (1)
where x represents the number of years since the coin was first purchased and W(x) is the current worth of the coin.
Now, this equation (1) is an exponential growth function.
Here, 250 is the initial value as we get W(x = 0) = 250 and 1.085 is known as the growth factor which can not be equal to 1. (Answer)
I think its 48.0298 hope that helped
-1/4 will be ration because all fractions are rational
Answer: 
Step-by-step explanation:
According to the given information, we have
n= 40

Critical z-value for 95% confidence = 
Confidence interval :

Hence, the 95 percent confidence interval for this result : 
No, because in the first one the 4 is negative, in the second it is positive