My graphing calculator says the acceleration at that time si 54.995 m/s.
I think the answer is 1,200
The second in the top row is this:
42.4-1.5(TIMES)3.1
42.4-46.5
-4.1
The factorization of the polynomial
is 
Step-by-step explanation:
We need to Complete the steps to factor
by grouping.
After grouping:

Factor the GCF from each group.

Use the distributive property.

So, the factorization of the polynomial
is 
Keywords: factorization by grouping
Learn more about factorization by grouping at:
#learnwithBrainly
To get the answer you divide the people by the area and it comes out to be 347.980769