If one of the number is x then the other one is 95-x
their product, p, is x times 95-x
p=(x)(95-x)=95x-x²
p(x)=95x-x²
(18*1900)/(28*32*12)
34200/10752
≈3.18 BTU/ft^3
So C) is the correct answer.
It would take 2 hours. To complete the whole lawn you would need:

To make a whole, so to get that we multiply:

So we use the same number required for the whole lawn, and multiply it times the hours
4875 rounded to the nearest hundred is 4900
Answer:
about 4312
Step-by-step explanation:
You want the total cost for n CDs to be 3.50n.
The manufacturer will charge you 9700+1.25n, so you want these to be equal:
3.50n = 9700 +1.25n
2.25n = 9700 . . . . . . . . subtract 1.25n
n = 9700/2.25 ≈ 4311.111...
Producing 4312 CDs will make the cost per CD slightly less than $3.50.
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Producing 4311 CDs will make the cost per CD be about $3.500058. Producing 4312 CDs will bring it down to $3.499536.