Because the ones place is under 5, we round down, and 392 becomes 390 when rounded to the nearest 10
To make it easier convert the times all into minutes.
2 hours 20 minutes = 120 minutes + 20 minute = 140 minutes
4 hours 10 minutes = 240 minutes + 10 minutes = 250 minutes
Then subtract:
250 minutes - 140 minutes = 110 minutes
Convert back to hours/minutes:
110 minute = 1 hour and 50 minutes
Answer: I think it's b
Step-by-step explanation:
The polynomial is: 
Step-by-step explanation:
We need to write a polynomial f(x) that meets the given conditions: Degree 3 polynomial with zeros 3,-5,4
Since zeros are at 3,-5 and 4
So, x=3, x=-5 and x=4
or:
x-3=0, x+5=0 and x-4=0
Multiplying all factors to find the polynomial:

So, the polynomial is: 
keywords: Factors and zeros of polynomial
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