Answer:
3 question papers
Step-by-step explanation:
If the teacher takes 15 minutes to mark 1 question paper. Then they will probably take 30 minutes to grade 2 question paper. Because 15 minutes+15 minutes=30 minutes. Then if you and another 15 minutes which will be 40 minutes because 15 minutes+15 minutes+15 minutes=40 minutes.
Hence, the teacher will mark 3 question papers in 40 minutes
The current price of the item is $2500 and the price 10 years from today is $3665. 2.
Given exponential function
p(t) = 2500 × (1.039)^t
where t is the number of years from today.
Rate of inflation is 3.9% per year
The computation of the current price of the item and the price 10 years from today is shown below:-
p(t) = 2500 × (1.039)^t
Now, the current price can be found by putting t = 0
p(0) is
p(0) =
= 2500
The price 10 years from today can be found by putting t = 10
p(10) is
p(10) = 
= 2500 × 1.466
= 3,665.181
Rounding to nearest dollar
= $3665. 2
The current price of the item is $2500 and the price 10 years from today is $3665. 2.
Find out more information about current price here
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14 because a negative minus a negative is a positive; you add a line and change the sign
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