The pool has area 
.
Let 
be the width of the sidewalk. Then the combined area of the pool and sidewalk is 
, so that the area of the sidewalk alone is 
.
We're told this area is 
, so
Well the prim factorization of a number is just all the prime numbers you need to get that number, so to get the prime factorization of -115 you have to start with -1 x 115, and I'll just continue this through sort of a factor pyramid
-1 x 115
-1 x 5 x 23
Those are all the prime numbers you need, really
For number 3, C is the answer.
#4. D
the coefficient of x² is negative, so the graph opens downward.
the two zeros are (3,0) and (5,0)
cannot see the question when editing. I'll post it in the comments.
Answer:
5 hours
Step-by-step explanation:
3h5min+1h55min=5hours
