Answer:
4
Step-by-step explanation:
9991 = 97×103
The greatest prime factor of 9991 is 103. The sum of digits of 103 is 1+0+3 = 4.
we have

we know that
this is the equation of a line, to identify which is the graph we will proceed to determine the points of intersection with the coordinate axes
1) <u>Find the y-intercept</u>
the y-intercept is when the value of x is equal to zero
For 
find the value of y


2) <u>Find the x-intercept </u>
the x-intercept is when the value of y is equal to zero
For 
find the value of x


therefore
the answer is the option B ( see the attached figure)
11/21 would be the answer
You can convert everything in minutes once you've solved it you turn it back to hours and minutes....5hrs and 8min= 308min....3hrs 12min=192min....308-192=116.....116 is 1hr and 56min