Answer:
I'm sorry
Step-by-step explanation:
Answer:
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Step-by-step explanation:
Given the half like of a material to be 8.3 hours and the amount of iron-52 left after t hours is modeled by the equation 
, we can get A(t) as shown;
At t = 8.3 hours, A(8.3) = 1/2
Initially at t = 0; A(0) = 1
Substituting this values into the function we will have;
Answer:
250
Step-by-step explanation:
Original cost * percent of the item = new price
Original *80% = 200
Change to decimal form
original *.80 =200
Divide each side by .80
original *.80/.80 = 200/.80
original =250
A bigger confidence interval means that more values are included
Then, an interval of 68% is narrower than 90%, which is narrower than 95%, which is narrower than 98%.
The only option of the list that is right is the second one.
Answer: the 90% confidence interval is narrower than the 95% confidence interval.
